mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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436 lines
12 KiB
C
436 lines
12 KiB
C
/* GStreamer
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* Copyright (C) 2008 Pioneers of the Inevitable <songbird@songbirdnest.com>
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*
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* Authors: Michael Smith <msmith@songbirdnest.com>
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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 <windows.h>
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#include <mmreg.h>
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#include <msacm.h>
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#include <gst/gst.h>
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#include <gst/riff/riff-media.h>
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#define ACM_BUFFER_SIZE (64 * 1024)
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#define GST_TYPE_ACM_MP3_DEC \
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(acmmp3dec_get_type())
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#define GST_ACM_MP3_DEC(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ACM_MP3_DEC,ACMMP3Dec))
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#define GST_CAT_DEFAULT acmmp3dec_debug
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GST_DEBUG_CATEGORY_STATIC (acmmp3dec_debug);
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static GstStaticPadTemplate acmmp3dec_src_template =
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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-raw-int, "
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"depth = (int)16, "
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"width = (int)16, "
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"endianness = (int)" G_STRINGIFY (G_BYTE_ORDER) ", "
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"signed = (boolean)TRUE, "
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"channels = (int) [1,2], " "rate = (int)[1, MAX]")
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);
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static GstStaticPadTemplate acmmp3dec_sink_template =
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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/mpeg, "
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"mpegversion = (int)1, "
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"layer = (int)3, "
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"rate = (int){ 8000, 11025, 12000, 16000, 22050, 24000, "
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" 32000, 44100, 48000 }, "
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"channels = (int)[1,2], " "parsed = (boolean) true")
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);
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typedef struct _ACMMP3DecClass
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{
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GstElementClass parent_class;
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} ACMMP3DecClass;
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typedef struct _ACMMP3Dec
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{
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GstElement parent;
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GstPad *sinkpad;
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GstPad *srcpad;
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gboolean is_setup;
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MPEGLAYER3WAVEFORMAT infmt;
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WAVEFORMATEX outfmt;
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HACMSTREAM stream;
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ACMSTREAMHEADER header;
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/* Next timestamp to push */
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GstClockTime timestamp;
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/* From received caps */
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int rate;
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int channels;
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GstCaps *output_caps;
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} ACMMP3Dec;
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GType acmmp3dec_get_type (void);
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GST_BOILERPLATE (ACMMP3Dec, acmmp3dec, GstElement, GST_TYPE_ELEMENT);
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static GstCaps *
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acmmp3dec_caps_from_format (WAVEFORMATEX * fmt)
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{
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return gst_riff_create_audio_caps (fmt->wFormatTag,
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NULL, (gst_riff_strf_auds *) fmt, NULL, NULL, NULL);
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}
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static gboolean
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acmmp3dec_set_input_format (ACMMP3Dec * dec)
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{
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dec->infmt.wfx.wFormatTag = WAVE_FORMAT_MPEGLAYER3;
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dec->infmt.wfx.nChannels = dec->channels;
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dec->infmt.wfx.nSamplesPerSec = dec->rate;
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dec->infmt.wfx.nAvgBytesPerSec = 8000; /* Has to be set, but actual
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value doesn't matter */
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dec->infmt.wfx.nBlockAlign = 1;
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dec->infmt.wfx.wBitsPerSample = 0;
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dec->infmt.wfx.cbSize = MPEGLAYER3_WFX_EXTRA_BYTES;
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dec->infmt.wID = MPEGLAYER3_ID_MPEG;
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dec->infmt.fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
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dec->infmt.nBlockSize = 1; /* Needs to be non-zero, actual
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value doesn't matter */
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dec->infmt.nFramesPerBlock = 1;
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dec->infmt.nCodecDelay = 0;
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return TRUE;
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}
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static gboolean
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acmmp3dec_set_output_format (ACMMP3Dec * dec)
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{
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dec->outfmt.wFormatTag = WAVE_FORMAT_PCM;
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dec->outfmt.nChannels = dec->channels;
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dec->outfmt.nSamplesPerSec = dec->rate;
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dec->outfmt.nAvgBytesPerSec = 2 * dec->channels * dec->rate;
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dec->outfmt.nBlockAlign = 2 * dec->channels;
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dec->outfmt.wBitsPerSample = 16;
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dec->outfmt.cbSize = 0;
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return TRUE;
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}
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static gboolean
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acmmp3dec_setup (ACMMP3Dec * dec)
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{
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MMRESULT res;
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int destBufferSize;
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acmmp3dec_set_input_format (dec);
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acmmp3dec_set_output_format (dec);
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res =
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acmStreamOpen (&dec->stream, NULL, (LPWAVEFORMATEX) & dec->infmt,
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&dec->outfmt, 0, 0, 0, 0);
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if (res) {
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GST_WARNING_OBJECT (dec, "Failed to open ACM stream: %d", res);
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return FALSE;
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}
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dec->header.cbStruct = sizeof (ACMSTREAMHEADER);
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dec->header.fdwStatus = 0;
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dec->header.dwUser = 0;
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dec->header.pbSrc = (BYTE *) g_malloc (ACM_BUFFER_SIZE);
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dec->header.cbSrcLength = ACM_BUFFER_SIZE;
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dec->header.cbSrcLengthUsed = 0;
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dec->header.dwSrcUser = 0;
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/* Ask what buffer size we need to use for our output */
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acmStreamSize (dec->stream, ACM_BUFFER_SIZE,
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(LPDWORD) & destBufferSize, ACM_STREAMSIZEF_SOURCE);
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dec->header.pbDst = (BYTE *) g_malloc (destBufferSize);
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dec->header.cbDstLength = destBufferSize;
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dec->header.cbDstLengthUsed = 0;
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dec->header.dwDstUser = 0;
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res = acmStreamPrepareHeader (dec->stream, &dec->header, 0);
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if (res) {
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GST_WARNING_OBJECT (dec, "Failed to prepare ACM stream: %x", res);
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return FALSE;
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}
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dec->output_caps = acmmp3dec_caps_from_format (&dec->outfmt);
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if (dec->output_caps) {
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gst_pad_set_caps (dec->srcpad, dec->output_caps);
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}
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dec->timestamp = GST_CLOCK_TIME_NONE;
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dec->is_setup = TRUE;
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return TRUE;
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}
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static void
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acmmp3dec_teardown (ACMMP3Dec * dec)
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{
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if (dec->output_caps) {
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gst_caps_unref (dec->output_caps);
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dec->output_caps = NULL;
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}
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if (dec->header.fdwStatus & ACMSTREAMHEADER_STATUSF_PREPARED)
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acmStreamUnprepareHeader (dec->stream, &dec->header, 0);
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if (dec->header.pbSrc)
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g_free (dec->header.pbSrc);
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if (dec->header.pbDst)
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g_free (dec->header.pbDst);
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memset (&dec->header, 0, sizeof (dec->header));
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if (dec->stream) {
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acmStreamClose (dec->stream, 0);
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dec->stream = 0;
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}
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dec->timestamp = GST_CLOCK_TIME_NONE;
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dec->is_setup = FALSE;
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}
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static gboolean
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acmmp3dec_sink_setcaps (GstPad * pad, GstCaps * caps)
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{
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ACMMP3Dec *dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
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GstStructure *structure;
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gboolean ret;
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structure = gst_caps_get_structure (caps, 0);
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gst_structure_get_int (structure, "channels", &dec->channels);
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gst_structure_get_int (structure, "rate", &dec->rate);
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if (dec->is_setup)
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acmmp3dec_teardown (dec);
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ret = acmmp3dec_setup (dec);
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return ret;
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}
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static GstFlowReturn
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acmmp3dec_push_output (ACMMP3Dec * dec)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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if (dec->header.cbDstLengthUsed > 0) {
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GstBuffer *outbuf = gst_buffer_new_and_alloc (dec->header.cbDstLengthUsed);
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memcpy (GST_BUFFER_DATA (outbuf), dec->header.pbDst,
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dec->header.cbDstLengthUsed);
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if (dec->timestamp != GST_CLOCK_TIME_NONE)
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GST_BUFFER_TIMESTAMP (outbuf) = dec->timestamp;
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GST_BUFFER_DURATION (outbuf) =
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gst_util_uint64_scale_int (GST_BUFFER_SIZE (outbuf), GST_SECOND,
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dec->rate * dec->channels * 2);
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GST_DEBUG_OBJECT (dec, "decoded buffer has ts %d, duration %d",
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(int) (GST_BUFFER_TIMESTAMP (outbuf)),
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(int) (GST_BUFFER_DURATION (outbuf)));
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gst_buffer_set_caps (outbuf, dec->output_caps);
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if (dec->timestamp != GST_CLOCK_TIME_NONE)
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dec->timestamp += GST_BUFFER_DURATION (outbuf);
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GST_DEBUG_OBJECT (dec, "Pushing %lu byte decoded buffer",
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dec->header.cbDstLengthUsed);
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ret = gst_pad_push (dec->srcpad, outbuf);
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} else
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GST_DEBUG_OBJECT (dec, "Not pushing decoded buffer, no output");
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return ret;
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}
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static GstFlowReturn
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acmmp3dec_chain (GstPad * pad, GstBuffer * buf)
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{
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MMRESULT res;
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ACMMP3Dec *dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
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guchar *data = GST_BUFFER_DATA (buf);
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gint len = GST_BUFFER_SIZE (buf);
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GstFlowReturn ret = GST_FLOW_OK;
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if (len > ACM_BUFFER_SIZE) {
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GST_WARNING_OBJECT (dec, "Impossibly large mp3 frame!");
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ret = GST_FLOW_ERROR;
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goto done;
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}
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if (GST_BUFFER_TIMESTAMP (buf) != GST_CLOCK_TIME_NONE &&
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(dec->timestamp == GST_CLOCK_TIME_NONE ||
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GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))) {
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dec->timestamp = GST_BUFFER_TIMESTAMP (buf);
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}
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memcpy (dec->header.pbSrc, data, len);
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dec->header.cbSrcLength = len;
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/* Now we have a buffer ready to go */
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res = acmStreamConvert (dec->stream, &dec->header,
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ACM_STREAMCONVERTF_BLOCKALIGN);
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if (res) {
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GST_WARNING_OBJECT (dec, "Failed to decode data");
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ret = GST_FLOW_OK; /* Maybe it was just a corrupt frame */
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goto done;
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}
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if (dec->header.cbSrcLengthUsed > 0) {
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if (dec->header.cbSrcLengthUsed != dec->header.cbSrcLength) {
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GST_WARNING_OBJECT (dec, "ACM decoder didn't consume all data!");
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/* We could handle this, but it shouldn't be possible, so don't try
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* for now */
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ret = GST_FLOW_ERROR;
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goto done;
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}
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/* Write out any data produced */
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acmmp3dec_push_output (dec);
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}
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done:
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gst_buffer_unref (buf);
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return ret;
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}
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static GstFlowReturn
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acmmp3dec_finish_stream (ACMMP3Dec * dec)
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{
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MMRESULT res;
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GstFlowReturn ret = GST_FLOW_OK;
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dec->header.cbSrcLength = 0;
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/* Flush out any remaining data internal to the decoder */
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res = acmStreamConvert (dec->stream, &dec->header,
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ACM_STREAMCONVERTF_BLOCKALIGN | ACM_STREAMCONVERTF_END);
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if (res) {
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GST_WARNING_OBJECT (dec, "Failed to decode data");
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return ret;
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}
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ret = acmmp3dec_push_output (dec);
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return ret;
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}
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static gboolean
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acmmp3dec_sink_event (GstPad * pad, GstEvent * event)
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{
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ACMMP3Dec *dec = (ACMMP3Dec *) GST_PAD_PARENT (pad);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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acmmp3dec_finish_stream (dec);
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break;
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case GST_EVENT_FLUSH_STOP:
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if (dec->stream)
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acmStreamReset (dec->stream, 0);
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dec->timestamp = GST_CLOCK_TIME_NONE;
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break;
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default:
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break;
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}
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return gst_pad_push_event (dec->srcpad, event);
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}
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static void
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acmmp3dec_dispose (GObject * obj)
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{
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ACMMP3Dec *dec = (ACMMP3Dec *) obj;
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if (dec->is_setup)
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acmmp3dec_teardown (dec);
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G_OBJECT_CLASS (parent_class)->dispose (obj);
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}
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static void
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acmmp3dec_init (ACMMP3Dec * dec, ACMMP3DecClass * decclass)
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{
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dec->sinkpad =
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gst_pad_new_from_static_template (&acmmp3dec_sink_template, "sink");
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gst_pad_set_setcaps_function (dec->sinkpad,
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GST_DEBUG_FUNCPTR (acmmp3dec_sink_setcaps));
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gst_pad_set_chain_function (dec->sinkpad,
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GST_DEBUG_FUNCPTR (acmmp3dec_chain));
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gst_pad_set_event_function (dec->sinkpad,
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GST_DEBUG_FUNCPTR (acmmp3dec_sink_event));
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gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
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dec->srcpad =
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gst_pad_new_from_static_template (&acmmp3dec_src_template, "src");
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gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
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}
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static void
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acmmp3dec_class_init (ACMMP3DecClass * klass)
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{
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GObjectClass *gobjectclass = (GObjectClass *) klass;
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gobjectclass->dispose = acmmp3dec_dispose;
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}
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static void
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acmmp3dec_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&acmmp3dec_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&acmmp3dec_src_template));
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gst_element_class_set_details_simple (element_class, "ACM MP3 decoder",
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"Codec/Decoder/Audio",
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"Decode MP3 using ACM decoder",
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"Pioneers of the Inevitable <songbird@songbirdnest.com");
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (acmmp3dec_debug, "acmmp3dec", 0, "ACM Decoders");
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GST_INFO ("Registering ACM MP3 decoder");
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if (!gst_element_register (plugin, "acmmp3dec", GST_RANK_PRIMARY,
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GST_TYPE_ACM_MP3_DEC)) {
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return FALSE;
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}
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return TRUE;
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"acmmp3dec",
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"ACM MP3 Decoder",
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plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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