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1234 lines
38 KiB
C
1234 lines
38 KiB
C
/* GStreamer
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*
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* Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstflacparse.h"
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#include <string.h>
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#include <gst/tag/tag.h>
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#include <gst/audio/audio.h>
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#include <gst/base/gstbitreader.h>
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#include <gst/base/gstbytereader.h>
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GST_DEBUG_CATEGORY_STATIC (flacparse_debug);
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#define GST_CAT_DEFAULT flacparse_debug
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static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-flac, "
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"channels = (int) [ 1, 8 ], " "rate = (int) [ 1, 655350 ]")
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);
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static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-flac")
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);
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static void gst_flac_parse_finalize (GObject * object);
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static gboolean gst_flac_parse_start (GstBaseParse * parse);
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static gboolean gst_flac_parse_stop (GstBaseParse * parse);
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static gboolean gst_flac_parse_check_valid_frame (GstBaseParse * parse,
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GstBuffer * buffer, guint * framesize, gint * skipsize);
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static GstFlowReturn gst_flac_parse_parse_frame (GstBaseParse * parse,
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GstBuffer * buffer);
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GST_BOILERPLATE (GstFlacParse, gst_flac_parse, GstBaseParse,
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GST_TYPE_BASE_PARSE);
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static void
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gst_flac_parse_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_factory));
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gst_element_class_set_details_simple (element_class, "FLAC audio parser",
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"Codec/Parser/Audio",
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"Parses audio with the FLAC lossless audio codec",
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"Sebastian Dröge <sebastian.droege@collabora.co.uk>");
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GST_DEBUG_CATEGORY_INIT (flacparse_debug, "flacparse", 0,
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"Flac parser element");
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}
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static void
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gst_flac_parse_class_init (GstFlacParseClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstBaseParseClass *baseparse_class = GST_BASE_PARSE_CLASS (klass);
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gobject_class->finalize = gst_flac_parse_finalize;
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baseparse_class->start = GST_DEBUG_FUNCPTR (gst_flac_parse_start);
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baseparse_class->stop = GST_DEBUG_FUNCPTR (gst_flac_parse_stop);
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baseparse_class->check_valid_frame =
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GST_DEBUG_FUNCPTR (gst_flac_parse_check_valid_frame);
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baseparse_class->parse_frame = GST_DEBUG_FUNCPTR (gst_flac_parse_parse_frame);
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}
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static void
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gst_flac_parse_init (GstFlacParse * flacparse, GstFlacParseClass * klass)
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{
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}
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static void
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gst_flac_parse_finalize (GObject * object)
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{
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GstFlacParse *flacparse = GST_FLAC_PARSE (object);
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if (flacparse->tags) {
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gst_tag_list_free (flacparse->tags);
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flacparse->tags = NULL;
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}
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g_list_foreach (flacparse->headers, (GFunc) gst_mini_object_unref, NULL);
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g_list_free (flacparse->headers);
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flacparse->headers = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static gboolean
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gst_flac_parse_start (GstBaseParse * parse)
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{
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GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
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flacparse->state = GST_FLAC_PARSE_STATE_INIT;
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flacparse->min_blocksize = 0;
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flacparse->max_blocksize = 0;
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flacparse->min_framesize = 0;
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flacparse->max_framesize = 0;
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flacparse->upstream_length = -1;
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flacparse->samplerate = 0;
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flacparse->channels = 0;
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flacparse->bps = 0;
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flacparse->total_samples = 0;
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flacparse->requested_frame_size = 0;
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flacparse->offset = GST_CLOCK_TIME_NONE;
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flacparse->blocking_strategy = 0;
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flacparse->block_size = 0;
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flacparse->sample_number = 0;
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/* "fLaC" marker */
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gst_base_parse_set_min_frame_size (GST_BASE_PARSE (flacparse), 4);
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return TRUE;
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}
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static gboolean
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gst_flac_parse_stop (GstBaseParse * parse)
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{
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GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
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if (flacparse->tags) {
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gst_tag_list_free (flacparse->tags);
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flacparse->tags = NULL;
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}
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g_list_foreach (flacparse->headers, (GFunc) gst_mini_object_unref, NULL);
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g_list_free (flacparse->headers);
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flacparse->headers = NULL;
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return TRUE;
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}
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static gint
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gst_flac_parse_get_frame_size (GstFlacParse * flacparse, GstBuffer * buffer,
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guint * framesize_ret)
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{
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GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
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guint16 samplerate;
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guint8 tmp;
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gint i;
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guint8 channel_assignment = 0;
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/* Skip 14 bit sync code */
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if (!gst_bit_reader_skip (&reader, 14))
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goto need_more_data;
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/* Must be 0 */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 1))
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goto need_more_data;
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else if (tmp != 0)
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goto error;
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/* 0 == fixed block size, 1 == variable block size */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &flacparse->blocking_strategy,
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1))
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goto need_more_data;
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/* block size index, calculation of the real blocksize below */
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if (!gst_bit_reader_get_bits_uint16 (&reader, &flacparse->block_size, 4))
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goto need_more_data;
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else if (flacparse->block_size == 0)
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goto error;
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/* sample rate index, calculation of the real samplerate below */
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if (!gst_bit_reader_get_bits_uint16 (&reader, &samplerate, 4))
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goto need_more_data;
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else if (samplerate == 0x0f)
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goto error;
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/* channel assignment */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 4)) {
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goto need_more_data;
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} else if (tmp < 8) {
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if (flacparse->channels && tmp + 1 != flacparse->channels)
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goto error;
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else
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flacparse->channels = tmp + 1;
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} else if (tmp <= 10 && flacparse->channels != 2) {
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if (flacparse->channels && 2 != flacparse->channels)
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goto error;
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else
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flacparse->channels = 2;
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if (tmp == 8)
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channel_assignment = 1; /* left-side */
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else if (tmp == 9)
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channel_assignment = 2; /* right-side */
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else
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channel_assignment = 3; /* mid-side */
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} else if (tmp > 10) {
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goto error;
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}
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/* bits per sample */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 3)) {
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goto need_more_data;
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} else if (tmp == 0x03 || tmp == 0x07) {
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goto error;
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} else if (tmp == 0 && flacparse->bps == 0) {
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goto need_streaminfo;
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} else if (tmp == 0x01 && flacparse->bps != 8) {
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if (flacparse->bps && flacparse->bps != 8)
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goto error;
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else
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flacparse->bps = 8;
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} else if (tmp == 0x02 && flacparse->bps != 12) {
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if (flacparse->bps && flacparse->bps != 12)
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goto error;
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else
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flacparse->bps = 12;
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} else if (tmp == 0x04 && flacparse->bps != 16) {
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if (flacparse->bps && flacparse->bps != 16)
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goto error;
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else
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flacparse->bps = 16;
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} else if (tmp == 0x05 && flacparse->bps != 20) {
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if (flacparse->bps && flacparse->bps != 20)
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goto error;
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else
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flacparse->bps = 20;
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} else if (tmp == 0x06 && flacparse->bps != 24) {
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if (flacparse->bps && flacparse->bps != 24)
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goto error;
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else
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flacparse->bps = 24;
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}
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/* reserved, must be 0 */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 1))
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goto need_more_data;
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else if (tmp != 0)
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goto error;
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/* read "utf8" encoded sample/frame number */
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{
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guint len = 0;
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tmp = 1;
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while (tmp != 0) {
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 1))
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goto need_more_data;
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else if (tmp == 1)
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len++;
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}
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if (len == 1)
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goto error;
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flacparse->sample_number = 0;
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if (len == 0) {
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 7))
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goto need_more_data;
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flacparse->sample_number = tmp;
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} else if ((flacparse->blocking_strategy == 0 && len > 6) ||
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(flacparse->blocking_strategy == 1 && len > 7)) {
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goto error;
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} else {
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 8 - len - 1))
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goto need_more_data;
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flacparse->sample_number = tmp;
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len -= 1;
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while (len > 0) {
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 2))
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goto need_more_data;
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else if (tmp != 0x02)
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goto error;
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 6))
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goto need_more_data;
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flacparse->sample_number <<= 6;
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flacparse->sample_number |= tmp;
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len--;
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}
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}
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}
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/* calculate real blocksize from the blocksize index */
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if (flacparse->block_size == 1)
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flacparse->block_size = 192;
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else if (flacparse->block_size <= 5)
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flacparse->block_size = 576 * (1 << (flacparse->block_size - 2));
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else if (flacparse->block_size <= 15)
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flacparse->block_size = 256 * (1 << (flacparse->block_size - 8));
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else if (flacparse->block_size == 6) {
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if (!gst_bit_reader_get_bits_uint16 (&reader, &flacparse->block_size, 8))
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goto need_more_data;
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flacparse->block_size++;
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} else if (flacparse->block_size == 7) {
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if (!gst_bit_reader_get_bits_uint16 (&reader, &flacparse->block_size, 16))
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goto need_more_data;
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flacparse->block_size++;
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}
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/* calculate the real samplerate from the samplerate index */
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if (samplerate == 0 && flacparse->samplerate == 0) {
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goto need_streaminfo;
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} else if (samplerate == 1) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 88200;
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else if (flacparse->samplerate != 88200)
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goto error;
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} else if (samplerate == 2) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 176400;
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else if (flacparse->samplerate != 176400)
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goto error;
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} else if (samplerate == 3) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 192000;
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else if (flacparse->samplerate != 192000)
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goto error;
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} else if (samplerate == 4) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 8000;
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else if (flacparse->samplerate != 8000)
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goto error;
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} else if (samplerate == 5) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 16000;
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else if (flacparse->samplerate != 16000)
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goto error;
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} else if (samplerate == 6) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 22050;
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else if (flacparse->samplerate != 22050)
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goto error;
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} else if (samplerate == 7) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 24000;
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else if (flacparse->samplerate != 24000)
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goto error;
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} else if (samplerate == 8) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 32000;
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else if (flacparse->samplerate != 32000)
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goto error;
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} else if (samplerate == 9) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 44100;
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else if (flacparse->samplerate != 44100)
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goto error;
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} else if (samplerate == 10) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 48000;
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else if (flacparse->samplerate != 48000)
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goto error;
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} else if (samplerate == 11) {
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if (flacparse->samplerate == 0)
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flacparse->samplerate = 96000;
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else if (flacparse->samplerate != 96000)
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goto error;
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} else if (samplerate == 12) {
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if (!gst_bit_reader_get_bits_uint16 (&reader, &samplerate, 8))
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goto need_more_data;
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samplerate *= 1000;
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if (flacparse->samplerate == 0)
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flacparse->samplerate = samplerate;
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else if (flacparse->samplerate != samplerate)
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goto error;
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} else if (samplerate == 13) {
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if (!gst_bit_reader_get_bits_uint16 (&reader, &samplerate, 16))
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goto need_more_data;
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if (flacparse->samplerate == 0)
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flacparse->samplerate = samplerate;
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else if (flacparse->samplerate != samplerate)
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goto error;
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} else if (samplerate == 14) {
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if (!gst_bit_reader_get_bits_uint16 (&reader, &samplerate, 16))
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goto need_more_data;
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samplerate *= 10;
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if (flacparse->samplerate == 0)
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flacparse->samplerate = samplerate;
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else if (flacparse->samplerate != samplerate)
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goto error;
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}
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/* skip crc-8 for the header */
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if (!gst_bit_reader_skip (&reader, 8))
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goto need_more_data;
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/* parse subframes, one subframe per channel */
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for (i = 0; i < flacparse->channels; i++) {
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guint8 sf_type;
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guint8 cur_bps;
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cur_bps = flacparse->bps;
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/* for mid/side, left/side, right/side the "difference" channel
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* needs and additional bit */
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if (i == 0 && channel_assignment == 2)
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cur_bps++;
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else if (i == 1 && (channel_assignment == 1 || channel_assignment == 3))
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cur_bps++;
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/* must be 0 */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 1))
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goto need_more_data;
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else if (tmp != 0)
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goto error;
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/* sub frame type */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &sf_type, 6))
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goto need_more_data;
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else if (((sf_type & 0xfe) == 0x02) ||
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((sf_type & 0xfc) == 0x04) ||
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((sf_type & 0xf8) == 0x08 && (sf_type & 0x07) > 4) ||
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((sf_type & 0xf0) == 0x10))
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goto error;
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/* wasted bits per sample, if 1 the value follows unary coded */
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 1)) {
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goto need_more_data;
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} else if (tmp != 0) {
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guint wasted = 1;
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tmp = 0;
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while (tmp == 0) {
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if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 1))
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goto need_more_data;
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else
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wasted++;
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}
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cur_bps -= wasted;
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}
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/* subframe type: constant */
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if (sf_type == 0x00) {
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if (!gst_bit_reader_skip (&reader, cur_bps))
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goto need_more_data;
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/* subframe type: verbatim */
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} else if (sf_type == 0x01) {
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if (!gst_bit_reader_skip (&reader, cur_bps * flacparse->block_size))
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goto need_more_data;
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/* subframe type: LPC or fixed */
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} else {
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guint8 residual_type;
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guint order = 0;
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guint16 partition_order;
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guint j;
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/* Skip warm-up samples for fixed subframe and calculate order */
|
|
if ((sf_type & 0xf8) == 0x08) {
|
|
order = sf_type & 0x07;
|
|
|
|
g_assert (order <= 4);
|
|
|
|
if (!gst_bit_reader_skip (&reader, cur_bps * order))
|
|
goto need_more_data;
|
|
/* Skip warm-up samples for LPC subframe, get parameters and calculate order */
|
|
} else if ((sf_type & 0xe0) == 0x20) {
|
|
guint8 prec;
|
|
|
|
order = (sf_type & 0x1f) + 1;
|
|
|
|
/* warm-up samples */
|
|
if (!gst_bit_reader_skip (&reader, cur_bps * order))
|
|
goto need_more_data;
|
|
|
|
/* LPC coefficient precision */
|
|
if (!gst_bit_reader_get_bits_uint8 (&reader, &prec, 4))
|
|
goto need_more_data;
|
|
else if (prec == 0x0f)
|
|
goto error;
|
|
prec++;
|
|
|
|
/* LPC coefficient shift */
|
|
if (!gst_bit_reader_skip (&reader, 5))
|
|
goto need_more_data;
|
|
|
|
/* LPC coefficients */
|
|
if (!gst_bit_reader_skip (&reader, order * prec))
|
|
goto need_more_data;
|
|
} else {
|
|
g_assert_not_reached ();
|
|
}
|
|
|
|
/* residual type: 0 == rice, 1 == rice2 */
|
|
if (!gst_bit_reader_get_bits_uint8 (&reader, &residual_type, 2))
|
|
goto need_more_data;
|
|
|
|
if (residual_type & 0x02)
|
|
goto error;
|
|
|
|
/* partition order */
|
|
if (!gst_bit_reader_get_bits_uint16 (&reader, &partition_order, 4))
|
|
goto need_more_data;
|
|
|
|
partition_order = 1 << partition_order;
|
|
|
|
/* 2^partition_order partitions */
|
|
for (j = 0; j < partition_order; j++) {
|
|
guint samples;
|
|
guint8 rice_parameter;
|
|
|
|
/* calculate number of samples for the current partition */
|
|
if (partition_order == 1) {
|
|
samples = flacparse->block_size - order;
|
|
} else if (j != 0) {
|
|
samples = flacparse->block_size / partition_order;
|
|
} else {
|
|
samples = flacparse->block_size / partition_order - order;
|
|
}
|
|
|
|
/* rice parameter */
|
|
if (!gst_bit_reader_get_bits_uint8 (&reader, &rice_parameter,
|
|
(residual_type == 0) ? 4 : 5))
|
|
goto need_more_data;
|
|
|
|
/* if rice parameter has all bits set the samples follow unencoded with the number of bits
|
|
* per sample in the following 5 bits */
|
|
if ((residual_type == 0 && rice_parameter == 0x0f)
|
|
|| (residual_type == 1 && rice_parameter == 0x1f)) {
|
|
if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 5))
|
|
goto need_more_data;
|
|
if (!gst_bit_reader_skip (&reader, tmp * samples))
|
|
goto need_more_data;
|
|
} else {
|
|
guint k;
|
|
|
|
/* read the rice encoded samples */
|
|
for (k = 0; k < samples; k++) {
|
|
tmp = 0;
|
|
while (tmp == 0)
|
|
if (!gst_bit_reader_get_bits_uint8 (&reader, &tmp, 1))
|
|
goto need_more_data;
|
|
|
|
if (!gst_bit_reader_skip (&reader, rice_parameter))
|
|
goto need_more_data;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* zero padding to byte alignment */
|
|
gst_bit_reader_skip_to_byte (&reader);
|
|
|
|
/* Skip crc-16 for the complete frame */
|
|
if (!gst_bit_reader_skip (&reader, 16))
|
|
goto need_more_data;
|
|
|
|
*framesize_ret = gst_bit_reader_get_pos (&reader) / 8;
|
|
|
|
GST_DEBUG_OBJECT (flacparse, "Parsed frame at offset %" G_GUINT64_FORMAT ":\n"
|
|
"Frame size: %u\n"
|
|
"Block size: %u\n"
|
|
"Sample/Frame number: %" G_GUINT64_FORMAT,
|
|
flacparse->offset, *framesize_ret,
|
|
flacparse->block_size, flacparse->sample_number);
|
|
|
|
return 0;
|
|
|
|
need_more_data:
|
|
{
|
|
gint64 upstream_len = flacparse->upstream_length;
|
|
GstFormat fmt;
|
|
gboolean first_try = TRUE;
|
|
|
|
GST_DEBUG_OBJECT (flacparse, "Need more data");
|
|
|
|
retry:
|
|
|
|
fmt = GST_FORMAT_BYTES;
|
|
if (upstream_len != -1 ||
|
|
(gst_pad_query_peer_duration (GST_BASE_PARSE_SINK_PAD (GST_BASE_PARSE
|
|
(flacparse)), &fmt, &upstream_len)
|
|
&& fmt == GST_FORMAT_BYTES && upstream_len != -1)) {
|
|
flacparse->upstream_length = upstream_len;
|
|
upstream_len -= GST_BUFFER_OFFSET (buffer);
|
|
|
|
if (flacparse->max_framesize
|
|
&& flacparse->max_framesize > flacparse->requested_frame_size
|
|
&& flacparse->max_framesize <= upstream_len) {
|
|
flacparse->requested_frame_size = flacparse->max_framesize;
|
|
} else if (flacparse->requested_frame_size + 4096 <= upstream_len) {
|
|
flacparse->requested_frame_size += 4096;
|
|
} else if (flacparse->requested_frame_size <= upstream_len) {
|
|
flacparse->requested_frame_size = upstream_len;
|
|
} else {
|
|
if (first_try) {
|
|
upstream_len = -1;
|
|
first_try = FALSE;
|
|
goto retry;
|
|
} else {
|
|
goto eos;
|
|
}
|
|
}
|
|
GST_DEBUG_OBJECT (flacparse, "Requesting %u bytes",
|
|
flacparse->requested_frame_size);
|
|
return flacparse->requested_frame_size;
|
|
} else {
|
|
flacparse->requested_frame_size++;
|
|
GST_DEBUG_OBJECT (flacparse, "Requesting %u bytes",
|
|
flacparse->requested_frame_size);
|
|
return flacparse->requested_frame_size;
|
|
}
|
|
}
|
|
|
|
need_streaminfo:
|
|
{
|
|
GST_ERROR_OBJECT (flacparse, "Need STREAMINFO");
|
|
return -2;
|
|
}
|
|
|
|
eos:
|
|
{
|
|
GST_WARNING_OBJECT (flacparse, "EOS");
|
|
return -1;
|
|
}
|
|
|
|
error:
|
|
{
|
|
GST_WARNING_OBJECT (flacparse, "Invalid frame");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_flac_parse_check_valid_frame (GstBaseParse * parse, GstBuffer * buffer,
|
|
guint * framesize, gint * skipsize)
|
|
{
|
|
GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
|
|
const guint8 *data = GST_BUFFER_DATA (buffer);
|
|
|
|
if (flacparse->state == GST_FLAC_PARSE_STATE_INIT) {
|
|
if (memcmp (GST_BUFFER_DATA (buffer), "fLaC", 4) == 0) {
|
|
GST_DEBUG_OBJECT (flacparse, "fLaC marker found");
|
|
*framesize = 4;
|
|
return TRUE;
|
|
} else if (data[0] == 0xff && (data[1] >> 2) == 0x3e) {
|
|
GST_DEBUG_OBJECT (flacparse, "Found headerless FLAC");
|
|
/* Minimal size of a frame header */
|
|
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (flacparse), 16);
|
|
flacparse->requested_frame_size = 16;
|
|
flacparse->state = GST_FLAC_PARSE_STATE_GENERATE_HEADERS;
|
|
*skipsize = 0;
|
|
return FALSE;
|
|
} else {
|
|
GST_DEBUG_OBJECT (flacparse, "fLaC marker not found");
|
|
return FALSE;
|
|
}
|
|
} else if (flacparse->state == GST_FLAC_PARSE_STATE_HEADERS) {
|
|
guint size = 4 + ((data[1] << 16) | (data[2] << 8) | (data[3]));
|
|
|
|
GST_DEBUG_OBJECT (flacparse, "Found metadata block of size %u", size);
|
|
*framesize = size;
|
|
return TRUE;
|
|
} else {
|
|
if (data[0] == 0xff && (data[1] >> 2) == 0x3e) {
|
|
gint ret = 0;
|
|
|
|
flacparse->offset = GST_BUFFER_OFFSET (buffer);
|
|
flacparse->blocking_strategy = 0;
|
|
flacparse->block_size = 0;
|
|
flacparse->sample_number = 0;
|
|
|
|
GST_DEBUG_OBJECT (flacparse, "Found sync code");
|
|
ret = gst_flac_parse_get_frame_size (flacparse, buffer, framesize);
|
|
if (ret == 0) {
|
|
return TRUE;
|
|
} else if (ret == -1) {
|
|
return FALSE;
|
|
} else if (ret == -2) {
|
|
GST_ELEMENT_ERROR (flacparse, STREAM, FORMAT, (NULL),
|
|
("Need STREAMINFO for parsing"));
|
|
return FALSE;
|
|
} else if (ret > 0) {
|
|
*skipsize = 0;
|
|
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (flacparse), ret);
|
|
flacparse->requested_frame_size = ret;
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (flacparse, "Sync code not found");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flac_parse_handle_streaminfo (GstFlacParse * flacparse, GstBuffer * buffer)
|
|
{
|
|
GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
|
|
|
|
if (GST_BUFFER_SIZE (buffer) != 4 + 34) {
|
|
GST_ERROR_OBJECT (flacparse, "Invalid metablock size for STREAMINFO: %u",
|
|
GST_BUFFER_SIZE (buffer));
|
|
return FALSE;
|
|
}
|
|
|
|
/* Skip metadata block header */
|
|
gst_bit_reader_skip (&reader, 32);
|
|
|
|
if (!gst_bit_reader_get_bits_uint16 (&reader, &flacparse->min_blocksize, 16))
|
|
goto error;
|
|
if (flacparse->min_blocksize < 16) {
|
|
GST_ERROR_OBJECT (flacparse, "Invalid minimum block size: %u",
|
|
flacparse->min_blocksize);
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_bit_reader_get_bits_uint16 (&reader, &flacparse->max_blocksize, 16))
|
|
goto error;
|
|
if (flacparse->max_blocksize < 16) {
|
|
GST_ERROR_OBJECT (flacparse, "Invalid maximum block size: %u",
|
|
flacparse->max_blocksize);
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_bit_reader_get_bits_uint32 (&reader, &flacparse->min_framesize, 24))
|
|
goto error;
|
|
if (!gst_bit_reader_get_bits_uint32 (&reader, &flacparse->max_framesize, 24))
|
|
goto error;
|
|
|
|
if (!gst_bit_reader_get_bits_uint32 (&reader, &flacparse->samplerate, 20))
|
|
goto error;
|
|
if (flacparse->samplerate == 0) {
|
|
GST_ERROR_OBJECT (flacparse, "Invalid sample rate 0");
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_bit_reader_get_bits_uint8 (&reader, &flacparse->channels, 3))
|
|
goto error;
|
|
flacparse->channels++;
|
|
if (flacparse->channels > 8) {
|
|
GST_ERROR_OBJECT (flacparse, "Invalid number of channels %u",
|
|
flacparse->channels);
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_bit_reader_get_bits_uint8 (&reader, &flacparse->bps, 5))
|
|
goto error;
|
|
flacparse->bps++;
|
|
|
|
if (!gst_bit_reader_get_bits_uint64 (&reader, &flacparse->total_samples, 36))
|
|
goto error;
|
|
if (flacparse->total_samples)
|
|
gst_base_parse_set_duration (GST_BASE_PARSE (flacparse), GST_FORMAT_TIME,
|
|
GST_FRAMES_TO_CLOCK_TIME (flacparse->total_samples,
|
|
flacparse->samplerate));
|
|
|
|
GST_DEBUG_OBJECT (flacparse, "STREAMINFO:\n"
|
|
"\tmin/max blocksize: %u/%u,\n"
|
|
"\tmin/max framesize: %u/%u,\n"
|
|
"\tsamplerate: %u,\n"
|
|
"\tchannels: %u,\n"
|
|
"\tbits per sample: %u,\n"
|
|
"\ttotal samples: %" G_GUINT64_FORMAT,
|
|
flacparse->min_blocksize, flacparse->max_blocksize,
|
|
flacparse->min_framesize, flacparse->max_framesize,
|
|
flacparse->samplerate,
|
|
flacparse->channels, flacparse->bps, flacparse->total_samples);
|
|
|
|
return TRUE;
|
|
|
|
error:
|
|
GST_ERROR_OBJECT (flacparse, "Failed to read data");
|
|
return FALSE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flac_parse_handle_vorbiscomment (GstFlacParse * flacparse,
|
|
GstBuffer * buffer)
|
|
{
|
|
flacparse->tags = gst_tag_list_from_vorbiscomment_buffer (buffer,
|
|
GST_BUFFER_DATA (buffer), 4, NULL);
|
|
|
|
if (flacparse->tags == NULL) {
|
|
GST_ERROR_OBJECT (flacparse, "Invalid vorbiscomment block");
|
|
} else if (gst_tag_list_is_empty (flacparse->tags)) {
|
|
gst_tag_list_free (flacparse->tags);
|
|
flacparse->tags = NULL;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flac_parse_handle_picture (GstFlacParse * flacparse, GstBuffer * buffer)
|
|
{
|
|
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (buffer);
|
|
const guint8 *data = GST_BUFFER_DATA (buffer);
|
|
guint32 img_len, img_type;
|
|
guint32 img_mimetype_len, img_description_len;
|
|
|
|
if (!gst_byte_reader_get_uint32_be (&reader, &img_type))
|
|
goto error;
|
|
|
|
if (!gst_byte_reader_get_uint32_be (&reader, &img_mimetype_len))
|
|
goto error;
|
|
if (!gst_byte_reader_skip (&reader, img_mimetype_len))
|
|
goto error;
|
|
|
|
if (!gst_byte_reader_get_uint32_be (&reader, &img_description_len))
|
|
goto error;
|
|
if (!gst_byte_reader_skip (&reader, img_description_len))
|
|
goto error;
|
|
|
|
if (!gst_byte_reader_skip (&reader, 4 * 4))
|
|
goto error;
|
|
|
|
if (!gst_byte_reader_get_uint32_be (&reader, &img_len))
|
|
goto error;
|
|
|
|
if (!flacparse->tags)
|
|
flacparse->tags = gst_tag_list_new ();
|
|
|
|
gst_tag_list_add_id3_image (flacparse->tags,
|
|
data + gst_byte_reader_get_pos (&reader), img_len, img_type);
|
|
|
|
if (gst_tag_list_is_empty (flacparse->tags)) {
|
|
gst_tag_list_free (flacparse->tags);
|
|
flacparse->tags = NULL;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
error:
|
|
GST_ERROR_OBJECT (flacparse, "Error reading data");
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
_value_array_append_buffer (GValue * array_val, GstBuffer * buf)
|
|
{
|
|
GValue value = { 0, };
|
|
|
|
g_value_init (&value, GST_TYPE_BUFFER);
|
|
/* copy buffer to avoid problems with circular refcounts */
|
|
buf = gst_buffer_copy (buf);
|
|
/* again, for good measure */
|
|
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_IN_CAPS);
|
|
gst_value_set_buffer (&value, buf);
|
|
gst_buffer_unref (buf);
|
|
gst_value_array_append_value (array_val, &value);
|
|
g_value_unset (&value);
|
|
}
|
|
|
|
static gboolean
|
|
gst_flac_parse_handle_headers (GstFlacParse * flacparse)
|
|
{
|
|
GstBuffer *vorbiscomment = NULL;
|
|
GstBuffer *streaminfo = NULL;
|
|
GstBuffer *marker = NULL;
|
|
GValue array = { 0, };
|
|
GstCaps *caps;
|
|
GList *l;
|
|
|
|
caps = gst_caps_new_simple ("audio/x-flac",
|
|
"channels", G_TYPE_INT, flacparse->channels,
|
|
"rate", G_TYPE_INT, flacparse->samplerate, NULL);
|
|
|
|
if (!flacparse->headers)
|
|
goto push_headers;
|
|
|
|
for (l = flacparse->headers; l; l = l->next) {
|
|
GstBuffer *header = l->data;
|
|
const guint8 *data = GST_BUFFER_DATA (header);
|
|
guint size = GST_BUFFER_SIZE (header);
|
|
|
|
GST_BUFFER_FLAG_SET (header, GST_BUFFER_FLAG_IN_CAPS);
|
|
|
|
if (size == 4 && memcmp (data, "fLaC", 4) == 0) {
|
|
marker = header;
|
|
} else if (size > 1 && (data[0] & 0x7f) == 0) {
|
|
streaminfo = header;
|
|
} else if (size > 1 && (data[0] & 0x7f) == 4) {
|
|
vorbiscomment = header;
|
|
}
|
|
}
|
|
|
|
if (marker == NULL || streaminfo == NULL || vorbiscomment == NULL) {
|
|
GST_WARNING_OBJECT (flacparse,
|
|
"missing header %p %p %p, muxing into container "
|
|
"formats may be broken", marker, streaminfo, vorbiscomment);
|
|
goto push_headers;
|
|
}
|
|
|
|
g_value_init (&array, GST_TYPE_ARRAY);
|
|
|
|
/* add marker including STREAMINFO header */
|
|
{
|
|
GstBuffer *buf;
|
|
guint16 num;
|
|
|
|
/* minus one for the marker that is merged with streaminfo here */
|
|
num = g_list_length (flacparse->headers) - 1;
|
|
|
|
buf = gst_buffer_new_and_alloc (13 + GST_BUFFER_SIZE (streaminfo));
|
|
GST_BUFFER_DATA (buf)[0] = 0x7f;
|
|
memcpy (GST_BUFFER_DATA (buf) + 1, "FLAC", 4);
|
|
GST_BUFFER_DATA (buf)[5] = 0x01; /* mapping version major */
|
|
GST_BUFFER_DATA (buf)[6] = 0x00; /* mapping version minor */
|
|
GST_BUFFER_DATA (buf)[7] = (num & 0xFF00) >> 8;
|
|
GST_BUFFER_DATA (buf)[8] = (num & 0x00FF) >> 0;
|
|
memcpy (GST_BUFFER_DATA (buf) + 9, "fLaC", 4);
|
|
memcpy (GST_BUFFER_DATA (buf) + 13, GST_BUFFER_DATA (streaminfo),
|
|
GST_BUFFER_SIZE (streaminfo));
|
|
_value_array_append_buffer (&array, buf);
|
|
gst_buffer_unref (buf);
|
|
}
|
|
|
|
/* add VORBISCOMMENT header */
|
|
_value_array_append_buffer (&array, vorbiscomment);
|
|
|
|
/* add other headers, if there are any */
|
|
for (l = flacparse->headers; l; l = l->next) {
|
|
if (GST_BUFFER_CAST (l->data) != marker &&
|
|
GST_BUFFER_CAST (l->data) != streaminfo &&
|
|
GST_BUFFER_CAST (l->data) != vorbiscomment) {
|
|
_value_array_append_buffer (&array, GST_BUFFER_CAST (l->data));
|
|
}
|
|
}
|
|
|
|
gst_structure_set_value (gst_caps_get_structure (caps, 0),
|
|
"streamheader", &array);
|
|
g_value_unset (&array);
|
|
|
|
push_headers:
|
|
|
|
gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (GST_BASE_PARSE (flacparse)), caps);
|
|
gst_caps_unref (caps);
|
|
|
|
/* push header buffers; update caps, so when we push the first buffer the
|
|
* negotiated caps will change to caps that include the streamheader field */
|
|
for (l = flacparse->headers; l != NULL; l = l->next) {
|
|
GstBuffer *buf = GST_BUFFER (l->data);
|
|
GstFlowReturn ret;
|
|
|
|
l->data = NULL;
|
|
gst_buffer_set_caps (buf,
|
|
GST_PAD_CAPS (GST_BASE_PARSE_SRC_PAD (GST_BASE_PARSE (flacparse))));
|
|
|
|
ret = gst_base_parse_push_buffer (GST_BASE_PARSE (flacparse), buf);
|
|
if (ret != GST_FLOW_OK)
|
|
return FALSE;
|
|
}
|
|
g_list_free (flacparse->headers);
|
|
flacparse->headers = NULL;
|
|
|
|
/* Push tags */
|
|
if (flacparse->tags)
|
|
gst_element_found_tags (GST_ELEMENT (flacparse),
|
|
gst_tag_list_copy (flacparse->tags));
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flac_parse_generate_headers (GstFlacParse * flacparse)
|
|
{
|
|
GstBuffer *marker, *streaminfo, *vorbiscomment;
|
|
guint8 *data;
|
|
|
|
marker = gst_buffer_new_and_alloc (4);
|
|
memcpy (GST_BUFFER_DATA (marker), "fLaC", 4);
|
|
GST_BUFFER_TIMESTAMP (marker) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DURATION (marker) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_OFFSET (marker) = 0;
|
|
GST_BUFFER_OFFSET_END (marker) = 0;
|
|
flacparse->headers = g_list_append (flacparse->headers, marker);
|
|
|
|
streaminfo = gst_buffer_new_and_alloc (4 + 34);
|
|
data = GST_BUFFER_DATA (streaminfo);
|
|
memset (data, 0, 4 + 34);
|
|
|
|
/* metadata block header */
|
|
data[0] = 0x00; /* is_last = 0; type = 0; */
|
|
data[1] = 0x00; /* length = 34; */
|
|
data[2] = 0x00;
|
|
data[3] = 0x22;
|
|
|
|
/* streaminfo */
|
|
|
|
data[4] = (flacparse->block_size >> 8) & 0xff; /* min blocksize = blocksize; */
|
|
data[5] = (flacparse->block_size) & 0xff;
|
|
data[6] = (flacparse->block_size >> 8) & 0xff; /* max blocksize = blocksize; */
|
|
data[7] = (flacparse->block_size) & 0xff;
|
|
|
|
data[8] = 0x00; /* min framesize = 0; */
|
|
data[9] = 0x00;
|
|
data[10] = 0x00;
|
|
data[11] = 0x00; /* max framesize = 0; */
|
|
data[12] = 0x00;
|
|
data[13] = 0x00;
|
|
|
|
data[14] = (flacparse->samplerate >> 12) & 0xff;
|
|
data[15] = (flacparse->samplerate >> 4) & 0xff;
|
|
data[16] = (flacparse->samplerate >> 0) & 0xf0;
|
|
|
|
data[16] |= (flacparse->channels - 1) << 1;
|
|
|
|
data[16] |= ((flacparse->bps - 1) >> 4) & 0x01;
|
|
data[17] = (((flacparse->bps - 1)) & 0x0f) << 4;
|
|
|
|
{
|
|
gint64 duration;
|
|
GstFormat fmt = GST_FORMAT_TIME;
|
|
|
|
if (gst_pad_query_peer_duration (GST_BASE_PARSE_SINK_PAD (GST_BASE_PARSE
|
|
(flacparse)), &fmt, &duration) && fmt == GST_FORMAT_TIME) {
|
|
duration = GST_CLOCK_TIME_TO_FRAMES (duration, flacparse->samplerate);
|
|
|
|
data[17] |= (duration >> 32) & 0xff;
|
|
data[18] |= (duration >> 24) & 0xff;
|
|
data[19] |= (duration >> 16) & 0xff;
|
|
data[20] |= (duration >> 8) & 0xff;
|
|
data[21] |= (duration >> 0) & 0xff;
|
|
}
|
|
}
|
|
/* MD5 = 0; */
|
|
|
|
GST_BUFFER_TIMESTAMP (streaminfo) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DURATION (streaminfo) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_OFFSET (streaminfo) = 0;
|
|
GST_BUFFER_OFFSET_END (streaminfo) = 0;
|
|
flacparse->headers = g_list_append (flacparse->headers, streaminfo);
|
|
|
|
/* empty vorbiscomment */
|
|
{
|
|
GstTagList *taglist = gst_tag_list_new ();
|
|
guchar header[4];
|
|
guint size;
|
|
|
|
header[0] = 0x84; /* is_last = 1; type = 4; */
|
|
|
|
vorbiscomment =
|
|
gst_tag_list_to_vorbiscomment_buffer (taglist, header, sizeof (header),
|
|
NULL);
|
|
gst_tag_list_free (taglist);
|
|
|
|
/* Get rid of framing bit */
|
|
if (GST_BUFFER_DATA (vorbiscomment)[GST_BUFFER_SIZE (vorbiscomment) - 1] ==
|
|
1) {
|
|
GstBuffer *sub;
|
|
|
|
sub =
|
|
gst_buffer_create_sub (vorbiscomment, 0,
|
|
GST_BUFFER_SIZE (vorbiscomment) - 1);
|
|
gst_buffer_unref (vorbiscomment);
|
|
vorbiscomment = sub;
|
|
}
|
|
|
|
size = GST_BUFFER_SIZE (vorbiscomment) - 4;
|
|
GST_BUFFER_DATA (vorbiscomment)[1] = ((size & 0xFF0000) >> 16);
|
|
GST_BUFFER_DATA (vorbiscomment)[2] = ((size & 0x00FF00) >> 8);
|
|
GST_BUFFER_DATA (vorbiscomment)[3] = (size & 0x0000FF);
|
|
|
|
GST_BUFFER_TIMESTAMP (vorbiscomment) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DURATION (vorbiscomment) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_OFFSET (vorbiscomment) = 0;
|
|
GST_BUFFER_OFFSET_END (vorbiscomment) = 0;
|
|
flacparse->headers = g_list_append (flacparse->headers, vorbiscomment);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flac_parse_parse_frame (GstBaseParse * parse, GstBuffer * buffer)
|
|
{
|
|
GstFlacParse *flacparse = GST_FLAC_PARSE (parse);
|
|
const guint8 *data = GST_BUFFER_DATA (buffer);
|
|
|
|
if (flacparse->state == GST_FLAC_PARSE_STATE_INIT) {
|
|
GST_BUFFER_TIMESTAMP (buffer) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_OFFSET (buffer) = 0;
|
|
GST_BUFFER_OFFSET_END (buffer) = 0;
|
|
|
|
/* 32 bits metadata block */
|
|
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (flacparse), 4);
|
|
flacparse->state = GST_FLAC_PARSE_STATE_HEADERS;
|
|
|
|
flacparse->headers =
|
|
g_list_append (flacparse->headers, gst_buffer_ref (buffer));
|
|
|
|
return GST_BASE_PARSE_FLOW_DROPPED;
|
|
} else if (flacparse->state == GST_FLAC_PARSE_STATE_HEADERS) {
|
|
gboolean is_last = ((data[0] & 0x80) == 0x80);
|
|
guint type = (data[0] & 0x7F);
|
|
|
|
if (type == 127) {
|
|
GST_WARNING_OBJECT (flacparse, "Invalid metadata block type");
|
|
return GST_BASE_PARSE_FLOW_DROPPED;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (flacparse, "Handling metadata block of type %u", type);
|
|
|
|
switch (type) {
|
|
case 0: /* STREAMINFO */
|
|
if (!gst_flac_parse_handle_streaminfo (flacparse, buffer))
|
|
return GST_FLOW_ERROR;
|
|
break;
|
|
case 3: /* SEEKTABLE */
|
|
/* TODO: handle seektables */
|
|
break;
|
|
case 4: /* VORBIS_COMMENT */
|
|
if (!gst_flac_parse_handle_vorbiscomment (flacparse, buffer))
|
|
return GST_FLOW_ERROR;
|
|
break;
|
|
case 6: /* PICTURE */
|
|
if (!gst_flac_parse_handle_picture (flacparse, buffer))
|
|
return GST_FLOW_ERROR;
|
|
break;
|
|
case 1: /* PADDING */
|
|
case 2: /* APPLICATION */
|
|
case 5: /* CUESHEET */
|
|
default: /* RESERVED */
|
|
break;
|
|
}
|
|
|
|
GST_BUFFER_TIMESTAMP (buffer) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_OFFSET (buffer) = 0;
|
|
GST_BUFFER_OFFSET_END (buffer) = 0;
|
|
|
|
if (is_last) {
|
|
flacparse->headers =
|
|
g_list_append (flacparse->headers, gst_buffer_ref (buffer));
|
|
|
|
if (!gst_flac_parse_handle_headers (flacparse))
|
|
return GST_FLOW_ERROR;
|
|
|
|
/* Minimal size of a frame header */
|
|
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (flacparse), MAX (16,
|
|
flacparse->min_framesize));
|
|
flacparse->requested_frame_size = MAX (16, flacparse->min_framesize);
|
|
flacparse->state = GST_FLAC_PARSE_STATE_DATA;
|
|
|
|
/* DROPPED because we pushed all headers manually already */
|
|
return GST_BASE_PARSE_FLOW_DROPPED;
|
|
} else {
|
|
flacparse->headers =
|
|
g_list_append (flacparse->headers, gst_buffer_ref (buffer));
|
|
return GST_BASE_PARSE_FLOW_DROPPED;
|
|
}
|
|
} else {
|
|
if (flacparse->offset != GST_BUFFER_OFFSET (buffer)) {
|
|
gint ret;
|
|
guint framesize;
|
|
|
|
flacparse->offset = GST_BUFFER_OFFSET (buffer);
|
|
ret = gst_flac_parse_get_frame_size (flacparse, buffer, &framesize);
|
|
if (ret != 0) {
|
|
GST_ERROR_OBJECT (flacparse,
|
|
"Baseclass didn't provide a complete frame");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
if (flacparse->block_size == 0) {
|
|
GST_ERROR_OBJECT (flacparse, "Unparsed frame");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
if (flacparse->state == GST_FLAC_PARSE_STATE_GENERATE_HEADERS) {
|
|
if (flacparse->blocking_strategy == 1) {
|
|
GST_WARNING_OBJECT (flacparse,
|
|
"Generating headers for variable blocksize streams not supported");
|
|
|
|
if (!gst_flac_parse_handle_headers (flacparse))
|
|
return GST_FLOW_ERROR;
|
|
} else {
|
|
GST_DEBUG_OBJECT (flacparse, "Generating headers");
|
|
|
|
if (!gst_flac_parse_generate_headers (flacparse))
|
|
return GST_FLOW_ERROR;
|
|
|
|
if (!gst_flac_parse_handle_headers (flacparse))
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
flacparse->state = GST_FLAC_PARSE_STATE_DATA;
|
|
}
|
|
|
|
if (flacparse->blocking_strategy == 0) {
|
|
GST_BUFFER_TIMESTAMP (buffer) =
|
|
gst_util_uint64_scale (flacparse->sample_number,
|
|
flacparse->block_size * GST_SECOND, flacparse->samplerate);
|
|
} else {
|
|
GST_BUFFER_TIMESTAMP (buffer) =
|
|
gst_util_uint64_scale (flacparse->sample_number, GST_SECOND,
|
|
flacparse->samplerate);
|
|
}
|
|
GST_BUFFER_DURATION (buffer) =
|
|
GST_FRAMES_TO_CLOCK_TIME (flacparse->block_size, flacparse->samplerate);
|
|
|
|
/* Minimal size of a frame header */
|
|
gst_base_parse_set_min_frame_size (GST_BASE_PARSE (flacparse), MAX (16,
|
|
flacparse->min_framesize));
|
|
flacparse->requested_frame_size = MAX (16, flacparse->min_framesize);
|
|
|
|
flacparse->offset = -1;
|
|
flacparse->blocking_strategy = 0;
|
|
flacparse->block_size = 0;
|
|
flacparse->sample_number = 0;
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|