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paf: split audio and video decoder 

Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Nidhi Makhijani 2014-07-06 10:12:50 +05:30 committed by Diego Biurrun
parent 373a6dda54
commit b0633f83f2
3 changed files with 87 additions and 67 deletions
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4
libavcodec/Makefile
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@ -289,8 +289,8 @@ OBJS-$(CONFIG_ON2AVC_DECODER) += on2avc.o on2avcdata.o
OBJS-$(CONFIG_OPUS_DECODER) += opusdec.o opus.o opus_celt.o \
opus_imdct.o opus_silk.o \
vorbis_data.o
OBJS-$(CONFIG_PAF_VIDEO_DECODER) += paf.o
OBJS-$(CONFIG_PAF_AUDIO_DECODER) += paf.o
OBJS-$(CONFIG_PAF_AUDIO_DECODER) += pafaudio.o
OBJS-$(CONFIG_PAF_VIDEO_DECODER) += pafvideo.o
OBJS-$(CONFIG_PAM_DECODER) += pnmdec.o pnm.o
OBJS-$(CONFIG_PAM_ENCODER) += pamenc.o
OBJS-$(CONFIG_PBM_DECODER) += pnmdec.o pnm.o

84
libavcodec/pafaudio.c Normal file
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@ -0,0 +1,84 @@
/*
* Packed Animation File audio decoder
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "internal.h"
#include "mathops.h"
#define PAF_SOUND_SAMPLES 2205
#define PAF_SOUND_FRAME_SIZE ((256 + PAF_SOUND_SAMPLES) * 2)
static av_cold int paf_audio_init(AVCodecContext *avctx)
{
if (avctx->channels != 2) {
av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
return AVERROR_INVALIDDATA;
}
avctx->channel_layout = AV_CH_LAYOUT_STEREO;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
return 0;
}
static int paf_audio_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *pkt)
{
AVFrame *frame = data;
int16_t *output_samples;
const uint8_t *src = pkt->data;
int frames, ret, i, j;
int16_t cb[256];
frames = pkt->size / PAF_SOUND_FRAME_SIZE;
if (frames < 1)
return AVERROR_INVALIDDATA;
frame->nb_samples = PAF_SOUND_SAMPLES * frames;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
output_samples = (int16_t *)frame->data[0];
// codebook of 256 16-bit samples and 8-bit indices to it
for (j = 0; j < frames; j++) {
for (i = 0; i < 256; i++)
cb[i] = sign_extend(AV_RL16(src + i * 2), 16);
src += 256 * 2;
// always 2 channels
for (i = 0; i < PAF_SOUND_SAMPLES * 2; i++)
*output_samples++ = cb[*src++];
}
*got_frame = 1;
return pkt->size;
}
AVCodec ff_paf_audio_decoder = {
.name = "paf_audio",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_PAF_AUDIO,
.init = paf_audio_init,
.decode = paf_audio_decode,
.capabilities = CODEC_CAP_DR1,
};

66
libavcodec/paf.c → libavcodec/pafvideo.c
View File

@ -1,5 +1,5 @@
/*
* Packed Animation File video and audio decoder
* Packed Animation File video decoder
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of Libav.
@ -20,16 +20,11 @@
*/
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"
#include "copy_block.h"
#include "internal.h"
#include "mathops.h"
#define PAF_SOUND_SAMPLES 2205
#define PAF_SOUND_FRAME_SIZE ((256 + PAF_SOUND_SAMPLES) * 2)
static const uint8_t block_sequences[16][8] = {
{ 0, 0, 0, 0, 0, 0, 0, 0 }, { 2, 0, 0, 0, 0, 0, 0, 0 },
@ -378,52 +373,6 @@ static int paf_video_decode(AVCodecContext *avctx, void *data,
return pkt->size;
}
static av_cold int paf_audio_init(AVCodecContext *avctx)
{
if (avctx->channels != 2) {
av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
return AVERROR_INVALIDDATA;
}
avctx->channel_layout = AV_CH_LAYOUT_STEREO;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
return 0;
}
static int paf_audio_decode(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *pkt)
{
AVFrame *frame = data;
int16_t *output_samples;
const uint8_t *src = pkt->data;
int frames, ret, i, j;
int16_t cb[256];
frames = pkt->size / PAF_SOUND_FRAME_SIZE;
if (frames < 1)
return AVERROR_INVALIDDATA;
frame->nb_samples = PAF_SOUND_SAMPLES * frames;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
output_samples = (int16_t *)frame->data[0];
// codebook of 256 16-bit samples and 8-bit indices to it
for (j = 0; j < frames; j++) {
for (i = 0; i < 256; i++)
cb[i] = sign_extend(AV_RL16(src + i * 2), 16);
src += 256 * 2;
// always 2 channels
for (i = 0; i < PAF_SOUND_SAMPLES * 2; i++)
*output_samples++ = cb[*src++];
}
*got_frame = 1;
return pkt->size;
}
#if CONFIG_PAF_VIDEO_DECODER
AVCodec ff_paf_video_decoder = {
.name = "paf_video",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Video"),
@ -435,16 +384,3 @@ AVCodec ff_paf_video_decoder = {
.decode = paf_video_decode,
.capabilities = CODEC_CAP_DR1,
};
#endif
#if CONFIG_PAF_AUDIO_DECODER
AVCodec ff_paf_audio_decoder = {
.name = "paf_audio",
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_PAF_AUDIO,
.init = paf_audio_init,
.decode = paf_audio_decode,
.capabilities = CODEC_CAP_DR1,
};
#endif