mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-09-17 01:20:19 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/ext/flac/gstflacdec.c
Maciej Katafiasz be7d42b548 Add semicolons after GST_BOILERPLATE[_FULL] so that indent doesn't mess up following lines. 
Original commit message from CVS:
Add semicolons after GST_BOILERPLATE[_FULL] so that indent doesn't mess up following lines.
2006-05-06 00:14:09 +00:00

1289 lines
38 KiB
C
Raw Blame History

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-flacdec
* @seealso: flacenc
*
* <refsect2>
* <para>
* flacdec decodes FLAC streams.
* <ulink url="http://flac.sourceforge.net/">FLAC</ulink>
* is a Free Lossless Audio Codec.
* </para>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch filesrc location=media/small/dark.441-16-s.flac ! flacdec ! audioconvert ! audioresample ! autoaudiosink
* </programlisting>
* </para>
* </refsect2>
*/
/*
* FIXME: this pipeline doesn't work, but we want to use it as example
* gst-launch gnomevfssrc location=http://gstreamer.freedesktop.org/media/small/dark.441-16-s.flac ! flacdec ! autoaudiosink
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstflacdec.h"
#include <gst/gsttagsetter.h>
#include <gst/tag/tag.h>
#include "flac_compat.h"
GST_DEBUG_CATEGORY_STATIC (flacdec_debug);
#define GST_CAT_DEFAULT flacdec_debug
static GstPadTemplate *src_template, *sink_template;
static const GstElementDetails flacdec_details =
GST_ELEMENT_DETAILS ("FLAC audio decoder",
"Codec/Decoder/Audio",
"Decodes FLAC lossless audio streams",
"Wim Taymans <wim.taymans@chello.be>");
static void gst_flac_dec_finalize (GObject * object);
static void gst_flac_dec_loop (GstPad * pad);
static GstStateChangeReturn gst_flac_dec_change_state (GstElement * element,
GstStateChange transition);
static const GstQueryType *gst_flac_dec_get_src_query_types (GstPad * pad);
static gboolean gst_flac_dec_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_flac_dec_convert_src (GstPad * pad, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
static gboolean gst_flac_dec_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_flac_dec_sink_activate (GstPad * sinkpad);
static gboolean gst_flac_dec_sink_activate_pull (GstPad * sinkpad,
gboolean active);
static void gst_flac_dec_send_newsegment (GstFlacDec * flacdec,
gboolean update);
static FLAC__SeekableStreamDecoderReadStatus
gst_flac_dec_read (const FLAC__SeekableStreamDecoder * decoder,
FLAC__byte buffer[], unsigned *bytes, void *client_data);
static FLAC__SeekableStreamDecoderSeekStatus
gst_flac_dec_seek (const FLAC__SeekableStreamDecoder * decoder,
FLAC__uint64 position, void *client_data);
static FLAC__SeekableStreamDecoderTellStatus
gst_flac_dec_tell (const FLAC__SeekableStreamDecoder * decoder,
FLAC__uint64 * position, void *client_data);
static FLAC__SeekableStreamDecoderLengthStatus
gst_flac_dec_length (const FLAC__SeekableStreamDecoder * decoder,
FLAC__uint64 * length, void *client_data);
static FLAC__bool gst_flac_dec_eof (const FLAC__SeekableStreamDecoder * decoder,
void *client_data);
static FLAC__StreamDecoderWriteStatus
gst_flac_dec_write (const FLAC__SeekableStreamDecoder * decoder,
const FLAC__Frame * frame,
const FLAC__int32 * const buffer[], void *client_data);
static void gst_flac_dec_metadata_callback (const FLAC__SeekableStreamDecoder *
decoder, const FLAC__StreamMetadata * metadata, void *client_data);
static void gst_flac_dec_error_callback (const FLAC__SeekableStreamDecoder *
decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
GST_BOILERPLATE (GstFlacDec, gst_flac_dec, GstElement, GST_TYPE_ELEMENT);
#define GST_FLAC_DEC_SRC_CAPS \
"audio/x-raw-int, " \
"endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", " \
"signed = (boolean) true, " \
"width = (int) { 8, 16, 32 }, " \
"depth = (int) { 8, 12, 16, 20, 24, 32 }, " \
"rate = (int) [ 8000, 96000 ], " \
"channels = (int) [ 1, 8 ]"
static void
gst_flac_dec_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
GstCaps *raw_caps, *flac_caps;
raw_caps = gst_caps_from_string (GST_FLAC_DEC_SRC_CAPS);
flac_caps = gst_caps_new_simple ("audio/x-flac", NULL);
sink_template = gst_pad_template_new ("sink", GST_PAD_SINK,
GST_PAD_ALWAYS, flac_caps);
src_template = gst_pad_template_new ("src", GST_PAD_SRC,
GST_PAD_ALWAYS, raw_caps);
gst_element_class_add_pad_template (element_class, sink_template);
gst_element_class_add_pad_template (element_class, src_template);
gst_element_class_set_details (element_class, &flacdec_details);
GST_DEBUG_CATEGORY_INIT (flacdec_debug, "flacdec", 0, "flac decoder");
}
static void
gst_flac_dec_class_init (GstFlacDecClass * klass)
{
GstElementClass *gstelement_class;
GObjectClass *gobject_class;
gstelement_class = (GstElementClass *) klass;
gobject_class = (GObjectClass *) klass;
gobject_class->finalize = gst_flac_dec_finalize;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_flac_dec_change_state);
}
static void
gst_flac_dec_init (GstFlacDec * flacdec, GstFlacDecClass * klass)
{
flacdec->sinkpad = gst_pad_new_from_template (sink_template, "sink");
gst_pad_set_activate_function (flacdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_flac_dec_sink_activate));
gst_pad_set_activatepull_function (flacdec->sinkpad,
GST_DEBUG_FUNCPTR (gst_flac_dec_sink_activate_pull));
gst_element_add_pad (GST_ELEMENT (flacdec), flacdec->sinkpad);
flacdec->srcpad = gst_pad_new_from_template (src_template, "src");
gst_pad_set_query_type_function (flacdec->srcpad,
GST_DEBUG_FUNCPTR (gst_flac_dec_get_src_query_types));
gst_pad_set_query_function (flacdec->srcpad,
GST_DEBUG_FUNCPTR (gst_flac_dec_src_query));
gst_pad_set_event_function (flacdec->srcpad,
GST_DEBUG_FUNCPTR (gst_flac_dec_src_event));
gst_pad_use_fixed_caps (flacdec->srcpad);
gst_element_add_pad (GST_ELEMENT (flacdec), flacdec->srcpad);
flacdec->decoder = FLAC__seekable_stream_decoder_new ();
flacdec->segment.last_stop = 0;
flacdec->init = TRUE;
FLAC__seekable_stream_decoder_set_read_callback (flacdec->decoder,
gst_flac_dec_read);
FLAC__seekable_stream_decoder_set_seek_callback (flacdec->decoder,
gst_flac_dec_seek);
FLAC__seekable_stream_decoder_set_tell_callback (flacdec->decoder,
gst_flac_dec_tell);
FLAC__seekable_stream_decoder_set_length_callback (flacdec->decoder,
gst_flac_dec_length);
FLAC__seekable_stream_decoder_set_eof_callback (flacdec->decoder,
gst_flac_dec_eof);
#if FLAC_VERSION >= 0x010003
FLAC__seekable_stream_decoder_set_write_callback (flacdec->decoder,
gst_flac_dec_write);
#else
FLAC__seekable_stream_decoder_set_write_callback (flacdec->decoder,
(FLAC__StreamDecoderWriteStatus (*)
(const FLAC__SeekableStreamDecoder * decoder,
const FLAC__Frame * frame,
const FLAC__int32 * buffer[], void *client_data))
(gst_flac_dec_write));
#endif
FLAC__seekable_stream_decoder_set_metadata_respond (flacdec->decoder,
FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__seekable_stream_decoder_set_metadata_callback (flacdec->decoder,
gst_flac_dec_metadata_callback);
FLAC__seekable_stream_decoder_set_error_callback (flacdec->decoder,
gst_flac_dec_error_callback);
FLAC__seekable_stream_decoder_set_client_data (flacdec->decoder, flacdec);
}
static void
gst_flac_dec_finalize (GObject * object)
{
GstFlacDec *flacdec;
flacdec = GST_FLAC_DEC (object);
if (flacdec->decoder)
FLAC__seekable_stream_decoder_delete (flacdec->decoder);
flacdec->decoder = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_flac_dec_update_metadata (GstFlacDec * flacdec,
const FLAC__StreamMetadata * metadata)
{
GstTagList *list;
guint32 number_of_comments, cursor, str_len;
gchar *p_value, *value, *name, *str_ptr;
list = gst_tag_list_new ();
if (list == NULL) {
return FALSE;
}
number_of_comments = metadata->data.vorbis_comment.num_comments;
value = NULL;
GST_DEBUG ("%d tag(s) found", number_of_comments);
for (cursor = 0; cursor < number_of_comments; cursor++) {
str_ptr = (gchar *) metadata->data.vorbis_comment.comments[cursor].entry;
str_len = metadata->data.vorbis_comment.comments[cursor].length;
p_value = g_strstr_len (str_ptr, str_len, "=");
if (p_value) {
name = g_strndup (str_ptr, p_value - str_ptr);
value = g_strndup (p_value + 1, str_ptr + str_len - p_value - 1);
GST_DEBUG ("%s : %s", name, value);
gst_vorbis_tag_add (list, name, value);
g_free (name);
g_free (value);
}
}
gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
GST_TAG_AUDIO_CODEC, "FLAC", NULL);
gst_element_found_tags_for_pad (GST_ELEMENT (flacdec), flacdec->srcpad, list);
return TRUE;
}
/* CRC-8, poly = x^8 + x^2 + x^1 + x^0, init = 0 */
static const guint8 crc8_table[256] = {
0x00, 0x07, 0x0E, 0x09, 0x1C, 0x1B, 0x12, 0x15,
0x38, 0x3F, 0x36, 0x31, 0x24, 0x23, 0x2A, 0x2D,
0x70, 0x77, 0x7E, 0x79, 0x6C, 0x6B, 0x62, 0x65,
0x48, 0x4F, 0x46, 0x41, 0x54, 0x53, 0x5A, 0x5D,
0xE0, 0xE7, 0xEE, 0xE9, 0xFC, 0xFB, 0xF2, 0xF5,
0xD8, 0xDF, 0xD6, 0xD1, 0xC4, 0xC3, 0xCA, 0xCD,
0x90, 0x97, 0x9E, 0x99, 0x8C, 0x8B, 0x82, 0x85,
0xA8, 0xAF, 0xA6, 0xA1, 0xB4, 0xB3, 0xBA, 0xBD,
0xC7, 0xC0, 0xC9, 0xCE, 0xDB, 0xDC, 0xD5, 0xD2,
0xFF, 0xF8, 0xF1, 0xF6, 0xE3, 0xE4, 0xED, 0xEA,
0xB7, 0xB0, 0xB9, 0xBE, 0xAB, 0xAC, 0xA5, 0xA2,
0x8F, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9D, 0x9A,
0x27, 0x20, 0x29, 0x2E, 0x3B, 0x3C, 0x35, 0x32,
0x1F, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0D, 0x0A,
0x57, 0x50, 0x59, 0x5E, 0x4B, 0x4C, 0x45, 0x42,
0x6F, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7D, 0x7A,
0x89, 0x8E, 0x87, 0x80, 0x95, 0x92, 0x9B, 0x9C,
0xB1, 0xB6, 0xBF, 0xB8, 0xAD, 0xAA, 0xA3, 0xA4,
0xF9, 0xFE, 0xF7, 0xF0, 0xE5, 0xE2, 0xEB, 0xEC,
0xC1, 0xC6, 0xCF, 0xC8, 0xDD, 0xDA, 0xD3, 0xD4,
0x69, 0x6E, 0x67, 0x60, 0x75, 0x72, 0x7B, 0x7C,
0x51, 0x56, 0x5F, 0x58, 0x4D, 0x4A, 0x43, 0x44,
0x19, 0x1E, 0x17, 0x10, 0x05, 0x02, 0x0B, 0x0C,
0x21, 0x26, 0x2F, 0x28, 0x3D, 0x3A, 0x33, 0x34,
0x4E, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5C, 0x5B,
0x76, 0x71, 0x78, 0x7F, 0x6A, 0x6D, 0x64, 0x63,
0x3E, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2C, 0x2B,
0x06, 0x01, 0x08, 0x0F, 0x1A, 0x1D, 0x14, 0x13,
0xAE, 0xA9, 0xA0, 0xA7, 0xB2, 0xB5, 0xBC, 0xBB,
0x96, 0x91, 0x98, 0x9F, 0x8A, 0x8D, 0x84, 0x83,
0xDE, 0xD9, 0xD0, 0xD7, 0xC2, 0xC5, 0xCC, 0xCB,
0xE6, 0xE1, 0xE8, 0xEF, 0xFA, 0xFD, 0xF4, 0xF3
};
static guint8
gst_flac_calculate_crc8 (guint8 * data, guint length)
{
guint8 crc = 0;
while (length--) {
crc = crc8_table[crc ^ *data];
++data;
}
return crc;
}
static gboolean
gst_flac_dec_scan_got_frame (GstFlacDec * flacdec, guint8 * data, guint size,
gint64 * last_sample_num)
{
guint headerlen;
guint sr_from_end = 0; /* can be 0, 8 or 16 */
guint bs_from_end = 0; /* can be 0, 8 or 16 */
guint32 val = 0;
guint8 bs, sr, ca, ss, pb;
if (size < 10)
return FALSE;
/* sync */
if (data[0] != 0xFF || data[1] != 0xF8)
return FALSE;
bs = (data[2] & 0xF0) >> 8; /* blocksize marker */
sr = (data[2] & 0x0F); /* samplerate marker */
ca = (data[3] & 0xF0) >> 8; /* channel assignment */
ss = (data[3] & 0x0F) >> 1; /* sample size marker */
pb = (data[3] & 0x01); /* padding bit */
GST_LOG ("got sync, bs=%x,sr=%x,ca=%x,ss=%x,pb=%x", bs, sr, ca, ss, pb);
if (sr == 0x0F || sr == 0x01 || sr == 0x02 || sr == 0x03 ||
ca >= 0x0B || ss == 0x03 || ss == 0x07) {
return FALSE;
}
/* read block size from end of header? */
if (bs == 6)
bs_from_end = 8;
else if (bs == 7)
bs_from_end = 16;
/* read sample rate from end of header? */
if (sr == 0x0C)
sr_from_end = 8;
else if (sr == 0x0D || sr == 0x0E)
sr_from_end = 16;
val = (guint32) g_utf8_get_char_validated ((gchar *) data + 4, -1);
if (val == (guint32) - 1 || val == (guint32) - 2) {
GST_LOG_OBJECT (flacdec, "failed to read sample/frame");
return FALSE;
}
headerlen = 4 + g_unichar_to_utf8 ((gunichar) val, NULL) +
(bs_from_end / 8) + (sr_from_end / 8);
if (gst_flac_calculate_crc8 (data, headerlen) != data[headerlen])
return FALSE;
if (flacdec->min_blocksize == flacdec->max_blocksize) {
*last_sample_num = (val + 1) * flacdec->min_blocksize;
} else {
*last_sample_num = val; /* FIXME: + length of last block in samples */
}
GST_DEBUG_OBJECT (flacdec, "last sample %" G_GINT64_FORMAT " = %"
GST_TIME_FORMAT, *last_sample_num,
GST_TIME_ARGS (*last_sample_num * GST_SECOND / flacdec->sample_rate));
return TRUE;
}
#define SCANBLOCK_SIZE (64*1024)
static void
gst_flac_dec_scan_for_last_block (GstFlacDec * flacdec, gint64 * samples)
{
GstFormat format = GST_FORMAT_BYTES;
gint64 file_size, offset;
GST_INFO_OBJECT (flacdec, "total number of samples unknown, scanning file");
if (!gst_pad_query_peer_duration (flacdec->sinkpad, &format, &file_size)) {
GST_WARNING_OBJECT (flacdec, "failed to query upstream size!");
return;
}
GST_DEBUG_OBJECT (flacdec, "upstream size: %" G_GINT64_FORMAT, file_size);
offset = file_size - 1;
while (offset >= MAX (SCANBLOCK_SIZE / 2, file_size / 2)) {
GstFlowReturn flow;
GstBuffer *buf = NULL;
guint8 *data;
guint size;
/* divide by 2 = not very sophisticated way to deal with overlapping */
offset -= SCANBLOCK_SIZE / 2;
GST_LOG_OBJECT (flacdec, "looking for frame at %" G_GINT64_FORMAT
"-%" G_GINT64_FORMAT, offset, offset + SCANBLOCK_SIZE);
flow = gst_pad_pull_range (flacdec->sinkpad, offset, SCANBLOCK_SIZE, &buf);
if (flow != GST_FLOW_OK) {
GST_DEBUG_OBJECT (flacdec, "flow = %s", gst_flow_get_name (flow));
return;
}
size = GST_BUFFER_SIZE (buf);
data = GST_BUFFER_DATA (buf);
while (size > 16) {
if (gst_flac_dec_scan_got_frame (flacdec, data, size, samples)) {
GST_DEBUG_OBJECT (flacdec, "frame sync at offset %" G_GINT64_FORMAT,
offset + GST_BUFFER_SIZE (buf) - size);
gst_buffer_unref (buf);
return;
}
++data;
--size;
}
gst_buffer_unref (buf);
}
}
static void
gst_flac_dec_metadata_callback (const FLAC__SeekableStreamDecoder * decoder,
const FLAC__StreamMetadata * metadata, void *client_data)
{
GstFlacDec *flacdec;
flacdec = GST_FLAC_DEC (client_data);
switch (metadata->type) {
case FLAC__METADATA_TYPE_STREAMINFO:{
gint64 samples;
samples = metadata->data.stream_info.total_samples;
flacdec->min_blocksize = metadata->data.stream_info.min_blocksize;
flacdec->max_blocksize = metadata->data.stream_info.max_blocksize;
flacdec->sample_rate = metadata->data.stream_info.sample_rate;
GST_DEBUG_OBJECT (flacdec, "blocksize: min=%u, max=%u",
flacdec->min_blocksize, flacdec->max_blocksize);
if (samples == 0) {
gst_flac_dec_scan_for_last_block (flacdec, &samples);
}
GST_DEBUG_OBJECT (flacdec, "total samples = %" G_GINT64_FORMAT, samples);
if (samples > 0) {
gst_segment_set_duration (&flacdec->segment, GST_FORMAT_DEFAULT,
samples);
if (flacdec->segment.stop == -1)
flacdec->segment.stop = samples;
}
break;
}
case FLAC__METADATA_TYPE_VORBIS_COMMENT:
gst_flac_dec_update_metadata (flacdec, metadata);
break;
default:
break;
}
}
static void
gst_flac_dec_error_callback (const FLAC__SeekableStreamDecoder * decoder,
FLAC__StreamDecoderErrorStatus status, void *client_data)
{
GstFlacDec *flacdec;
gchar *error;
flacdec = GST_FLAC_DEC (client_data);
switch (status) {
case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
error = "lost sync";
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
error = "bad header";
break;
case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
error = "CRC mismatch";
break;
default:
error = "unknown error";
break;
}
GST_ELEMENT_ERROR (flacdec, STREAM, DECODE, (NULL), (error));
flacdec->last_flow = GST_FLOW_ERROR;
}
static FLAC__SeekableStreamDecoderSeekStatus
gst_flac_dec_seek (const FLAC__SeekableStreamDecoder * decoder,
FLAC__uint64 position, void *client_data)
{
GstFlacDec *flacdec;
flacdec = GST_FLAC_DEC (client_data);
GST_DEBUG ("seek %" G_GINT64_FORMAT, position);
flacdec->offset = position;
return FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK;
}
static FLAC__SeekableStreamDecoderTellStatus
gst_flac_dec_tell (const FLAC__SeekableStreamDecoder * decoder,
FLAC__uint64 * position, void *client_data)
{
GstFlacDec *flacdec;
flacdec = GST_FLAC_DEC (client_data);
*position = flacdec->offset;
GST_DEBUG ("tell %" G_GINT64_FORMAT, *position);
return FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK;
}
static FLAC__SeekableStreamDecoderLengthStatus
gst_flac_dec_length (const FLAC__SeekableStreamDecoder * decoder,
FLAC__uint64 * length, void *client_data)
{
GstFlacDec *flacdec;
GstFormat fmt = GST_FORMAT_BYTES;
gint64 len;
GstPad *peer;
flacdec = GST_FLAC_DEC (client_data);
if (!(peer = gst_pad_get_peer (flacdec->sinkpad)))
return FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR;
gst_pad_query_duration (peer, &fmt, &len);
gst_object_unref (peer);
if (fmt != GST_FORMAT_BYTES || len == -1)
return FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR;
*length = len;
GST_DEBUG ("length %" G_GINT64_FORMAT, *length);
return FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK;
}
static FLAC__bool
gst_flac_dec_eof (const FLAC__SeekableStreamDecoder * decoder,
void *client_data)
{
GstFlacDec *flacdec;
GstFormat fmt;
GstPad *peer;
gboolean ret = FALSE;
gint64 len;
flacdec = GST_FLAC_DEC (client_data);
if (!(peer = gst_pad_get_peer (flacdec->sinkpad))) {
GST_WARNING_OBJECT (flacdec, "no peer pad, returning EOF");
return TRUE;
}
fmt = GST_FORMAT_BYTES;
if (gst_pad_query_duration (peer, &fmt, &len) && fmt == GST_FORMAT_BYTES &&
len != -1 && flacdec->offset >= len) {
GST_DEBUG ("offset=%" G_GINT64_FORMAT ", len=%" G_GINT64_FORMAT
", returning EOF", flacdec->offset, len);
ret = TRUE;
}
gst_object_unref (peer);
return ret;
}
static FLAC__SeekableStreamDecoderReadStatus
gst_flac_dec_read (const FLAC__SeekableStreamDecoder * decoder,
FLAC__byte buffer[], unsigned *bytes, void *client_data)
{
GstFlacDec *flacdec;
GstBuffer *buf;
flacdec = GST_FLAC_DEC (client_data);
if (gst_pad_pull_range (flacdec->sinkpad, flacdec->offset, *bytes,
&buf) != GST_FLOW_OK)
return FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR;
GST_DEBUG ("Read %d bytes at %" G_GUINT64_FORMAT,
GST_BUFFER_SIZE (buf), flacdec->offset);
memcpy (buffer, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
*bytes = GST_BUFFER_SIZE (buf);
gst_buffer_unref (buf);
flacdec->offset += *bytes;
return FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK;
}
static FLAC__StreamDecoderWriteStatus
gst_flac_dec_write (const FLAC__SeekableStreamDecoder * decoder,
const FLAC__Frame * frame,
const FLAC__int32 * const buffer[], void *client_data)
{
GstFlowReturn ret = GST_FLOW_OK;
GstFlacDec *flacdec;
GstBuffer *outbuf;
guint depth = frame->header.bits_per_sample;
guint width;
guint channels = frame->header.channels;
guint samples = frame->header.blocksize;
guint j, i;
flacdec = GST_FLAC_DEC (client_data);
switch (depth) {
case 8:
width = 8;
break;
case 12:
case 16:
width = 16;
break;
case 20:
case 24:
case 32:
width = 32;
break;
default:
g_assert_not_reached ();
}
if (!GST_PAD_CAPS (flacdec->srcpad)) {
GstCaps *caps;
GST_DEBUG ("Negotiating %d Hz @ %d channels",
frame->header.sample_rate, channels);
caps = gst_caps_new_simple ("audio/x-raw-int",
"endianness", G_TYPE_INT, G_BYTE_ORDER,
"signed", G_TYPE_BOOLEAN, TRUE,
"width", G_TYPE_INT, width,
"depth", G_TYPE_INT, depth,
"rate", G_TYPE_INT, frame->header.sample_rate,
"channels", G_TYPE_INT, channels, NULL);
if (!gst_pad_set_caps (flacdec->srcpad, caps)) {
GST_ELEMENT_ERROR (flacdec, CORE, NEGOTIATION, (NULL),
("Failed to negotiate caps %" GST_PTR_FORMAT, caps));
flacdec->last_flow = GST_FLOW_ERROR;
gst_caps_unref (caps);
return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
}
gst_caps_unref (caps);
flacdec->depth = depth;
flacdec->width = width;
flacdec->channels = channels;
flacdec->sample_rate = frame->header.sample_rate;
}
if (flacdec->need_newsegment) {
gst_flac_dec_send_newsegment (flacdec, FALSE);
flacdec->need_newsegment = FALSE;
}
ret = gst_pad_alloc_buffer_and_set_caps (flacdec->srcpad,
flacdec->segment.last_stop, samples * channels * (width / 8),
GST_PAD_CAPS (flacdec->srcpad), &outbuf);
if (ret != GST_FLOW_OK) {
GST_DEBUG ("gst_pad_alloc_buffer() returned %s", gst_flow_get_name (ret));
goto done;
}
GST_BUFFER_TIMESTAMP (outbuf) =
gst_util_uint64_scale_int (flacdec->segment.last_stop, GST_SECOND,
frame->header.sample_rate);
GST_BUFFER_DURATION (outbuf) =
gst_util_uint64_scale_int (samples, GST_SECOND,
frame->header.sample_rate);
if (depth == 8) {
gint8 *outbuffer = (gint8 *) GST_BUFFER_DATA (outbuf);
for (i = 0; i < samples; i++) {
for (j = 0; j < channels; j++) {
*outbuffer++ = (gint8) buffer[j][i];
}
}
} else if (depth == 12 || depth == 16) {
gint16 *outbuffer = (gint16 *) GST_BUFFER_DATA (outbuf);
for (i = 0; i < samples; i++) {
for (j = 0; j < channels; j++) {
*outbuffer++ = (gint16) buffer[j][i];
}
}
} else if (depth == 20 || depth == 24 || depth == 32) {
gint32 *outbuffer = (gint32 *) GST_BUFFER_DATA (outbuf);
for (i = 0; i < samples; i++) {
for (j = 0; j < channels; j++) {
*outbuffer++ = (gint32) buffer[j][i];
}
}
} else {
g_assert_not_reached ();
}
if (!flacdec->seeking) {
GST_DEBUG ("pushing %d samples at offset %" G_GINT64_FORMAT
"(%" GST_TIME_FORMAT " + %" GST_TIME_FORMAT ")",
samples, GST_BUFFER_OFFSET (outbuf),
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
ret = gst_pad_push (flacdec->srcpad, outbuf);
} else {
GST_DEBUG ("not pushing %d samples at offset %" G_GINT64_FORMAT
" (in seek)", samples, GST_BUFFER_OFFSET (outbuf));
gst_buffer_unref (outbuf);
ret = GST_FLOW_OK;
}
if (ret != GST_FLOW_OK) {
GST_DEBUG ("gst_pad_push() returned %s", gst_flow_get_name (ret));
}
done:
flacdec->segment.last_stop += samples;
/* we act on the flow return value later in the loop function, as we don't
* want to mess up the internal decoder state by returning ABORT when the
* error is in fact non-fatal (like a pad in flushing mode) and we want
* to continue later. So just pretend everything's dandy and act later. */
flacdec->last_flow = ret;
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}
static void
gst_flac_dec_loop (GstPad * sinkpad)
{
GstFlacDec *flacdec;
FLAC__SeekableStreamDecoderState s;
flacdec = GST_FLAC_DEC (GST_OBJECT_PARENT (sinkpad));
GST_LOG_OBJECT (flacdec, "entering loop");
if (flacdec->init) {
GST_DEBUG_OBJECT (flacdec, "initializing decoder");
s = FLAC__seekable_stream_decoder_init (flacdec->decoder);
if (s != FLAC__SEEKABLE_STREAM_DECODER_OK)
goto analyze_state;
/* FLAC__seekable_stream_decoder_process_metadata (flacdec->decoder); */
flacdec->init = FALSE;
}
flacdec->last_flow = GST_FLOW_OK;
GST_LOG_OBJECT (flacdec, "processing single");
FLAC__seekable_stream_decoder_process_single (flacdec->decoder);
analyze_state:
GST_LOG_OBJECT (flacdec, "done processing, checking encoder state");
s = FLAC__seekable_stream_decoder_get_state (flacdec->decoder);
switch (s) {
case FLAC__SEEKABLE_STREAM_DECODER_OK:
case FLAC__SEEKABLE_STREAM_DECODER_SEEKING:{
GST_DEBUG_OBJECT (flacdec, "everything ok");
if (flacdec->last_flow != GST_FLOW_OK &&
flacdec->last_flow != GST_FLOW_NOT_LINKED) {
GST_DEBUG_OBJECT (flacdec, "last_flow return was %s, pausing",
gst_flow_get_name (flacdec->last_flow));
goto pause;
}
/* check if we're at the end of a configured segment */
if (flacdec->segment.stop != -1 &&
flacdec->segment.last_stop > 0 &&
flacdec->segment.last_stop >= flacdec->segment.stop) {
gint64 stop_time;
GST_DEBUG_OBJECT (flacdec, "reached end of the configured segment");
if ((flacdec->segment.flags & GST_SEEK_FLAG_SEGMENT) == 0)
goto eos_and_pause;
GST_DEBUG_OBJECT (flacdec, "posting SEGMENT_DONE message");
stop_time = gst_util_uint64_scale_int (flacdec->segment.stop,
GST_SECOND, flacdec->sample_rate);
gst_element_post_message (GST_ELEMENT (flacdec),
gst_message_new_segment_done (GST_OBJECT (flacdec),
GST_FORMAT_TIME, stop_time));
goto pause;
}
return;
}
case FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM:{
GST_DEBUG_OBJECT (flacdec, "EOS");
FLAC__seekable_stream_decoder_reset (flacdec->decoder);
goto eos_and_pause;
}
case FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR:
case FLAC__SEEKABLE_STREAM_DECODER_STREAM_DECODER_ERROR:
case FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR:
case FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR:
case FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED:
case FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK:
case FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED:
default:{
/* fixme: this error sucks -- should try to figure out when/if an more
specific error was already sent via the callback */
GST_ELEMENT_ERROR (flacdec, STREAM, DECODE, (NULL),
("%s", FLAC__SeekableStreamDecoderStateString[s]));
goto eos_and_pause;
}
}
return;
eos_and_pause:
{
GST_DEBUG_OBJECT (flacdec, "sending EOS event");
gst_pad_push_event (flacdec->srcpad, gst_event_new_eos ());
/* fall through to pause */
}
pause:
{
GST_DEBUG_OBJECT (flacdec, "pausing");
gst_pad_pause_task (sinkpad);
return;
}
}
static gboolean
gst_flac_dec_convert_src (GstPad * pad, GstFormat src_format, gint64 src_value,
GstFormat * dest_format, gint64 * dest_value)
{
GstFlacDec *flacdec = GST_FLAC_DEC (GST_PAD_PARENT (pad));
gboolean res = TRUE;
guint bytes_per_sample;
guint scale = 1;
if (flacdec->width == 0 || flacdec->channels == 0 ||
flacdec->sample_rate == 0) {
/* no frame decoded yet */
GST_DEBUG_OBJECT (flacdec, "cannot convert: not set up yet");
return FALSE;
}
bytes_per_sample = flacdec->channels * (flacdec->width / 8);
switch (src_format) {
case GST_FORMAT_BYTES:{
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_value =
gst_util_uint64_scale_int (src_value, 1, bytes_per_sample);
break;
case GST_FORMAT_TIME:
{
gint byterate = bytes_per_sample * flacdec->sample_rate;
*dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
byterate);
break;
}
default:
res = FALSE;
}
break;
}
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = src_value * bytes_per_sample;
break;
case GST_FORMAT_TIME:
*dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
flacdec->sample_rate);
break;
default:
res = FALSE;
}
break;
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
scale = bytes_per_sample;
case GST_FORMAT_DEFAULT:
*dest_value = gst_util_uint64_scale_int (src_value,
scale * flacdec->sample_rate, GST_SECOND);
break;
default:
res = FALSE;
}
break;
default:
res = FALSE;
}
return res;
}
static const GstQueryType *
gst_flac_dec_get_src_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0,
};
return types;
}
static gboolean
gst_flac_dec_src_query (GstPad * pad, GstQuery * query)
{
GstFlacDec *flacdec;
gboolean res = TRUE;
GstPad *peer;
flacdec = GST_FLAC_DEC (gst_pad_get_parent (pad));
peer = gst_pad_get_peer (flacdec->sinkpad);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:{
GstFormat fmt;
gint64 pos;
gst_query_parse_position (query, &fmt, NULL);
if (fmt != GST_FORMAT_DEFAULT) {
if (!gst_flac_dec_convert_src (flacdec->srcpad, GST_FORMAT_DEFAULT,
flacdec->segment.last_stop, &fmt, &pos)) {
GST_DEBUG_OBJECT (flacdec, "failed to convert position into %s "
"format", gst_format_get_name (fmt));
res = FALSE;
goto done;
}
} else {
pos = flacdec->segment.last_stop;
}
gst_query_set_position (query, fmt, pos);
GST_DEBUG_OBJECT (flacdec, "returning position %" G_GUINT64_FORMAT
" (format: %s)", pos, gst_format_get_name (fmt));
res = TRUE;
break;
}
case GST_QUERY_DURATION:{
GstFormat fmt;
gint64 len;
gst_query_parse_duration (query, &fmt, NULL);
/* try any demuxers before us first */
if (fmt == GST_FORMAT_TIME && peer && gst_pad_query (peer, query)) {
gst_query_parse_duration (query, NULL, &len);
GST_DEBUG_OBJECT (flacdec, "peer returned duration %" GST_TIME_FORMAT,
len);
res = TRUE;
goto done;
}
if (flacdec->segment.duration == 0 || flacdec->segment.duration == -1) {
GST_DEBUG_OBJECT (flacdec, "duration not known yet");
res = FALSE;
goto done;
}
/* convert total number of samples to request format */
if (fmt != GST_FORMAT_DEFAULT) {
if (!gst_flac_dec_convert_src (flacdec->srcpad, GST_FORMAT_DEFAULT,
flacdec->segment.duration, &fmt, &len)) {
GST_DEBUG_OBJECT (flacdec, "failed to convert duration into %s "
"format", gst_format_get_name (fmt));
res = FALSE;
goto done;
}
} else {
len = flacdec->segment.duration;
}
gst_query_set_duration (query, fmt, len);
GST_DEBUG_OBJECT (flacdec, "returning duration %" G_GUINT64_FORMAT
" (format: %s)", len, gst_format_get_name (fmt));
res = TRUE;
break;
}
case GST_QUERY_CONVERT:{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
res = gst_flac_dec_convert_src (pad, src_fmt, src_val, &dest_fmt,
&dest_val);
if (res) {
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
}
break;
}
default:{
res = gst_pad_query_default (pad, query);
break;
}
}
done:
if (peer)
gst_object_unref (peer);
gst_object_unref (flacdec);
return res;
}
static void
gst_flac_dec_send_newsegment (GstFlacDec * flacdec, gboolean update)
{
GstSegment *s = &flacdec->segment;
GstFormat target_format = GST_FORMAT_TIME;
gint64 stop_time = GST_CLOCK_TIME_NONE;
gint64 start_time = 0;
/* segment is in DEFAULT format, but we want to send a TIME newsegment */
if (!gst_flac_dec_convert_src (flacdec->srcpad, GST_FORMAT_DEFAULT,
s->start, &target_format, &start_time)) {
GST_WARNING_OBJECT (flacdec, "failed to convert segment start %lld to TIME",
s->start);
return;
}
if (s->stop != -1 && !gst_flac_dec_convert_src (flacdec->srcpad,
GST_FORMAT_DEFAULT, s->stop, &target_format, &stop_time)) {
GST_WARNING_OBJECT (flacdec, "failed to convert segment stop to TIME");
return;
}
GST_DEBUG_OBJECT (flacdec, "sending newsegment from %" GST_TIME_FORMAT
" to %" GST_TIME_FORMAT, GST_TIME_ARGS (start_time),
GST_TIME_ARGS (stop_time));
gst_pad_push_event (flacdec->srcpad,
gst_event_new_new_segment (update, s->rate, GST_FORMAT_TIME,
start_time, stop_time, start_time));
}
static gboolean
gst_flac_dec_handle_seek_event (GstFlacDec * flacdec, GstEvent * event)
{
FLAC__bool seek_ok;
GstSeekFlags seek_flags;
GstSeekType start_type;
GstSeekType stop_type;
GstSegment segment;
GstFormat seek_format;
gboolean only_update = FALSE;
gboolean flush;
gdouble rate;
gint64 start;
gint64 stop;
gst_event_parse_seek (event, &rate, &seek_format, &seek_flags, &start_type,
&start, &stop_type, &stop);
if (seek_format != GST_FORMAT_DEFAULT && seek_format != GST_FORMAT_TIME) {
GST_DEBUG ("seeking is only supported in TIME or DEFAULT format");
return FALSE;
}
if (rate < 0.0) {
GST_DEBUG ("only forward playback supported, rate %f not allowed", rate);
return FALSE;
}
if (seek_format != GST_FORMAT_DEFAULT) {
GstFormat target_format = GST_FORMAT_DEFAULT;
if (start_type != GST_SEEK_TYPE_NONE &&
!gst_flac_dec_convert_src (flacdec->srcpad, seek_format, start,
&target_format, &start)) {
GST_DEBUG ("failed to convert start to DEFAULT format");
return FALSE;
}
if (stop_type != GST_SEEK_TYPE_NONE &&
!gst_flac_dec_convert_src (flacdec->srcpad, seek_format, stop,
&target_format, &stop)) {
GST_DEBUG ("failed to convert stop to DEFAULT format");
return FALSE;
}
}
flush = ((seek_flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
if (flush) {
gst_pad_push_event (flacdec->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (flacdec->sinkpad);
}
GST_PAD_STREAM_LOCK (flacdec->sinkpad);
/* operate on segment copy until we know the seek worked */
segment = flacdec->segment;
if (segment.duration > 0) {
if (start != -1)
start = CLAMP (start, 0, segment.duration - 1);
if (stop != -1)
stop = CLAMP (stop, 0, segment.duration - 1);
}
gst_segment_set_seek (&segment, rate, GST_FORMAT_DEFAULT,
seek_flags, start_type, start, stop_type, stop, &only_update);
GST_DEBUG ("configured segment: [%" G_GINT64_FORMAT "-%" G_GINT64_FORMAT
"] = [%" GST_TIME_FORMAT "-%" GST_TIME_FORMAT "]",
segment.start, segment.stop,
GST_TIME_ARGS (segment.start * GST_SECOND / flacdec->sample_rate),
GST_TIME_ARGS (segment.stop * GST_SECOND / flacdec->sample_rate));
GST_DEBUG_OBJECT (flacdec, "performing seek to sample %" G_GINT64_FORMAT,
segment.start);
flacdec->seeking = TRUE;
seek_ok = FLAC__seekable_stream_decoder_seek_absolute (flacdec->decoder,
segment.start);
flacdec->seeking = FALSE;
/* FIXME: support segment seeks */
if (flush) {
gst_pad_push_event (flacdec->srcpad, gst_event_new_flush_stop ());
}
if (seek_ok) {
flacdec->segment = segment;
gst_flac_dec_send_newsegment (flacdec, FALSE);
flacdec->segment.last_stop = segment.start;
GST_DEBUG_OBJECT (flacdec, "seek successful");
/* notify start of new segment */
if ((flacdec->segment.flags & GST_SEEK_FLAG_SEGMENT) != 0) {
GstMessage *msg;
gint64 start_time = 0;
start_time = gst_util_uint64_scale_int (segment.start, GST_SECOND,
flacdec->sample_rate);
msg = gst_message_new_segment_start (GST_OBJECT (flacdec),
GST_FORMAT_TIME, start_time);
gst_element_post_message (GST_ELEMENT (flacdec), msg);
}
} else {
GST_WARNING_OBJECT (flacdec, "seek failed");
}
gst_pad_start_task (flacdec->sinkpad,
(GstTaskFunction) gst_flac_dec_loop, flacdec->sinkpad);
GST_PAD_STREAM_UNLOCK (flacdec->sinkpad);
return TRUE;
}
static gboolean
gst_flac_dec_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstFlacDec *flacdec = GST_FLAC_DEC (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
/* first, see if we're before a demuxer that
* might handle the seek for us */
gst_event_ref (event);
res = gst_pad_event_default (pad, event);
/* if not, try to handle it ourselves */
if (!res) {
res = gst_flac_dec_handle_seek_event (flacdec, event);
}
gst_event_unref (event);
break;
}
default:
res = gst_pad_event_default (pad, event);
break;
}
gst_object_unref (flacdec);
return res;
}
static gboolean
gst_flac_dec_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad))
return gst_pad_activate_pull (sinkpad, TRUE);
return FALSE;
}
static gboolean
gst_flac_dec_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
if (active) {
/* if we have a scheduler we can start the task */
GST_FLAC_DEC (GST_OBJECT_PARENT (sinkpad))->offset = 0;
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_flac_dec_loop,
sinkpad);
} else {
return gst_pad_stop_task (sinkpad);
}
}
static GstStateChangeReturn
gst_flac_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstFlacDec *flacdec = GST_FLAC_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
flacdec->segment.last_stop = 0;
flacdec->need_newsegment = TRUE;
flacdec->seeking = FALSE;
flacdec->channels = 0;
flacdec->depth = 0;
flacdec->width = 0;
flacdec->sample_rate = 0;
if (flacdec->init == FALSE) {
FLAC__seekable_stream_decoder_reset (flacdec->decoder);
}
gst_segment_init (&flacdec->segment, GST_FORMAT_DEFAULT);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_segment_init (&flacdec->segment, GST_FORMAT_UNDEFINED);
break;
default:
break;
}
return ret;
}
Reference in a new issue View git blame Copy permalink