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Merge commit 'a42e3a6700547e4e49445bda81d3a89ec3e081a9'

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* commit 'a42e3a6700547e4e49445bda81d3a89ec3e081a9':
  pcm_dvd: consolidate pieces from pcm.c and mpeg.c

Conflicts:
	libavcodec/pcm.c
	libavcodec/version.h
	libavformat/mpeg.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-01 13:00:08 +02:00
commit cb4d05e7f2
5 changed files with 293 additions and 71 deletions
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2
libavcodec/Makefile
View File

@ -522,7 +522,7 @@ OBJS-$(CONFIG_ZMBV_ENCODER) += zmbvenc.o
OBJS-$(CONFIG_PCM_ALAW_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_ALAW_ENCODER) += pcm.o
OBJS-$(CONFIG_PCM_BLURAY_DECODER) += pcm-bluray.o
OBJS-$(CONFIG_PCM_DVD_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_DVD_DECODER) += pcm-dvd.o
OBJS-$(CONFIG_PCM_F32BE_DECODER) += pcm.o
OBJS-$(CONFIG_PCM_F32BE_ENCODER) += pcm.o
OBJS-$(CONFIG_PCM_F32LE_DECODER) += pcm.o

289
libavcodec/pcm-dvd.c Normal file
View File

@ -0,0 +1,289 @@
/*
* LPCM codecs for PCM formats found in Video DVD streams
* Copyright (c) 2009-2013 Christian Schmidt
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* LPCM codecs for PCM formats found in Video DVD streams
*/
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
typedef struct PCMDVDContext {
uint32_t last_header; // Cached header to see if parsing is needed
int block_size; // Size of a block of samples in bytes
int samples_per_block; // Number of samples per channel per block
int groups_per_block; // Number of 20/24bit sample groups per block
uint8_t *extra_samples; // Pointer to leftover samples from a frame
int extra_sample_count; // Number of leftover samples in the buffer
} PCMDVDContext;
static av_cold int pcm_dvd_decode_init(AVCodecContext *avctx)
{
PCMDVDContext *s = avctx->priv_data;
/* Invalid header to force parsing of the first header */
s->last_header = -1;
/* reserve space for 8 channels, 3 bytes/sample, 4 samples/block */
if (!(s->extra_samples = av_malloc(8 * 3 * 4)))
return AVERROR(ENOMEM);
s->extra_sample_count = 0;
return 0;
}
static av_cold int pcm_dvd_decode_uninit(AVCodecContext *avctx)
{
PCMDVDContext *s = avctx->priv_data;
if (s->extra_samples)
av_free(s->extra_samples);
return 0;
}
static int pcm_dvd_parse_header(AVCodecContext *avctx, const uint8_t *header)
{
/* no traces of 44100 and 32000Hz in any commercial software or player */
static const uint32_t frequencies[4] = { 48000, 96000, 44100, 32000 };
PCMDVDContext *s = avctx->priv_data;
int header_int = (header[0] & 0xe0) | (header[1] << 8) | (header[2] << 16);
/* early exit if the header didn't change apart from the frame number */
if (s->last_header == header_int)
return 0;
if (avctx->debug & FF_DEBUG_PICT_INFO)
av_dlog(avctx, "pcm_dvd_parse_header: header = %02x%02x%02x\n",
header[0], header[1], header[2]);
/*
* header[0] emphasis (1), muse(1), reserved(1), frame number(5)
* header[1] quant (2), freq(2), reserved(1), channels(3)
* header[2] dynamic range control (0x80 = off)
*/
/* get the sample depth and derive the sample format from it */
avctx->bits_per_coded_sample = 16 + (header[1] >> 6 & 3) * 4;
if (avctx->bits_per_coded_sample == 28) {
av_log(avctx, AV_LOG_ERROR,
"PCM DVD unsupported sample depth %i\n",
avctx->bits_per_coded_sample);
return AVERROR_INVALIDDATA;
}
avctx->sample_fmt = avctx->bits_per_coded_sample == 16 ? AV_SAMPLE_FMT_S16
: AV_SAMPLE_FMT_S32;
avctx->bits_per_raw_sample = avctx->bits_per_coded_sample;
/* get the sample rate */
avctx->sample_rate = frequencies[header[1] >> 4 & 3];
/* get the number of channels */
avctx->channels = 1 + (header[1] & 7);
/* calculate the bitrate */
avctx->bit_rate = avctx->channels *
avctx->sample_rate *
avctx->bits_per_coded_sample;
/* 4 samples form a group in 20/24bit PCM on DVD Video.
* A block is formed by the number of groups that are
* needed to complete a set of samples for each channel. */
if (avctx->bits_per_coded_sample == 16) {
s->samples_per_block = 1;
s->block_size = avctx->channels * 2;
} else {
switch (avctx->channels) {
case 1:
case 2:
case 4:
/* one group has all the samples needed */
s->block_size = 4 * avctx->bits_per_coded_sample / 8;
s->samples_per_block = 4 / avctx->channels;
s->groups_per_block = 1;
break;
case 8:
/* two groups have all the samples needed */
s->block_size = 8 * avctx->bits_per_coded_sample / 8;
s->samples_per_block = 1;
s->groups_per_block = 2;
break;
default:
/* need avctx->channels groups */
s->block_size = 4 * avctx->channels *
avctx->bits_per_coded_sample / 8;
s->samples_per_block = 4;
s->groups_per_block = avctx->channels;
break;
}
}
if (avctx->debug & FF_DEBUG_PICT_INFO)
av_dlog(avctx,
"pcm_dvd_parse_header: %d channels, %d bits per sample, %d Hz, %d bit/s\n",
avctx->channels, avctx->bits_per_coded_sample,
avctx->sample_rate, avctx->bit_rate);
s->last_header = header_int;
return 0;
}
static void *pcm_dvd_decode_samples(AVCodecContext *avctx, const uint8_t *src,
void *dst, int blocks)
{
PCMDVDContext *s = avctx->priv_data;
int16_t *dst16 = dst;
int32_t *dst32 = dst;
GetByteContext gb;
int i;
uint8_t t;
int samples;
bytestream2_init(&gb, src, blocks * s->block_size);
switch (avctx->bits_per_coded_sample) {
case 16:
#if HAVE_BIGENDIAN
bytestream2_get_buffer(&gb, dst16, blocks * s->block_size);
dst16 += blocks * block_size / 2;
#else
samples = blocks * avctx->channels;
do {
*dst16++ = bytestream2_get_be16u(&gb);
} while (--samples);
#endif
return dst16;
case 20:
do {
for (i = s->groups_per_block; i; i--) {
dst32[0] = bytestream2_get_be16u(&gb) << 16;
dst32[1] = bytestream2_get_be16u(&gb) << 16;
dst32[2] = bytestream2_get_be16u(&gb) << 16;
dst32[3] = bytestream2_get_be16u(&gb) << 16;
t = bytestream2_get_byteu(&gb);
*dst32 += (t & 0xf0) << 8;
*dst32 += (t & 0x0f) << 12;
t = bytestream2_get_byteu(&gb);
*dst32 += (t & 0xf0) << 8;
*dst32 += (t & 0x0f) << 12;
}
} while (--blocks);
return dst32;
case 24:
do {
for (i = s->groups_per_block; i; i--) {
dst32[0] = bytestream2_get_be16u(&gb) << 16;
dst32[1] = bytestream2_get_be16u(&gb) << 16;
dst32[2] = bytestream2_get_be16u(&gb) << 16;
dst32[3] = bytestream2_get_be16u(&gb) << 16;
*dst32++ += bytestream2_get_byteu(&gb) << 8;
*dst32++ += bytestream2_get_byteu(&gb) << 8;
*dst32++ += bytestream2_get_byteu(&gb) << 8;
*dst32++ += bytestream2_get_byteu(&gb) << 8;
}
} while (--blocks);
return dst32;
default:
return NULL;
}
}
static int pcm_dvd_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *src = avpkt->data;
int buf_size = avpkt->size;
PCMDVDContext *s = avctx->priv_data;
int retval;
int blocks;
void *dst;
if (buf_size < 3) {
av_log(avctx, AV_LOG_ERROR, "PCM packet too small\n");
return AVERROR_INVALIDDATA;
}
if ((retval = pcm_dvd_parse_header(avctx, src)))
return retval;
src += 3;
buf_size -= 3;
blocks = (buf_size + s->extra_sample_count) / s->block_size;
/* get output buffer */
frame->nb_samples = blocks * s->samples_per_block;
if ((retval = ff_get_buffer(avctx, frame, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return retval;
}
dst = frame->data[0];
/* consume leftover samples from last packet */
if (s->extra_sample_count) {
int missing_samples = s->block_size - s->extra_sample_count;
if (buf_size >= missing_samples) {
memcpy(s->extra_samples + s->extra_sample_count, src,
missing_samples);
dst = pcm_dvd_decode_samples(avctx, s->extra_samples, dst, 1);
src += missing_samples;
buf_size -= missing_samples;
s->extra_sample_count = 0;
blocks--;
} else {
/* new packet still doesn't have enough samples */
memcpy(s->extra_samples + s->extra_sample_count, src, buf_size);
s->extra_sample_count += buf_size;
return avpkt->size;
}
}
/* decode remaining complete samples */
if (blocks) {
pcm_dvd_decode_samples(avctx, src, dst, blocks);
buf_size -= blocks * s->block_size;
}
/* store leftover samples */
if (buf_size) {
src += blocks * s->block_size;
memcpy(s->extra_samples, src, buf_size);
s->extra_sample_count = buf_size;
}
*got_frame_ptr = 1;
return avpkt->size;
}
AVCodec ff_pcm_dvd_decoder = {
.name = "pcm_dvd",
.long_name = NULL_IF_CONFIG_SMALL("PCM signed 16|20|24-bit big-endian for DVD media"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_PCM_DVD,
.priv_data_size = sizeof(PCMDVDContext),
.init = pcm_dvd_decode_init,
.decode = pcm_dvd_decode_frame,
.close = pcm_dvd_decode_uninit,
.capabilities = CODEC_CAP_DR1,
.sample_fmts = (const enum AVSampleFormat[]) {
AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_NONE
}
};

45
libavcodec/pcm.c
View File

@ -298,18 +298,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
/* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
samples_per_block = 1;
if (avctx->codec_id == AV_CODEC_ID_PCM_DVD) {
if (avctx->bits_per_coded_sample != 20 &&
avctx->bits_per_coded_sample != 24) {
av_log(avctx, AV_LOG_ERROR,
"PCM DVD unsupported sample depth %i\n",
avctx->bits_per_coded_sample);
return AVERROR(EINVAL);
}
/* 2 samples are interleaved per block in PCM_DVD */
samples_per_block = 2;
sample_size = avctx->bits_per_coded_sample * 2 / 8;
} else if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
/* we process 40-bit blocks per channel for LXF */
samples_per_block = 2;
sample_size = 5;
@ -470,37 +459,6 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data,
samples += 2;
}
break;
case AV_CODEC_ID_PCM_DVD:
{
const uint8_t *src8;
dst_int32_t = (int32_t *)frame->data[0];
n /= avctx->channels;
switch (avctx->bits_per_coded_sample) {
case 20:
while (n--) {
c = avctx->channels;
src8 = src + 4 * c;
while (c--) {
*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
}
src = src8;
}
break;
case 24:
while (n--) {
c = avctx->channels;
src8 = src + 4 * c;
while (c--) {
*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
*dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
}
src = src8;
}
break;
}
break;
}
case AV_CODEC_ID_PCM_LXF:
{
int i;
@ -583,7 +541,6 @@ AVCodec ff_ ## name_ ## _decoder = { \
/* Note: Do not forget to add new entries to the Makefile as well. */
PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
PCM_DECODER(PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");

2
libavcodec/version.h
View File

@ -29,7 +29,7 @@
#include "libavutil/avutil.h"
#define LIBAVCODEC_VERSION_MAJOR 55
#define LIBAVCODEC_VERSION_MINOR 29
#define LIBAVCODEC_VERSION_MINOR 30
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

24
libavformat/mpeg.c
View File

@ -535,7 +535,6 @@ static int mpegps_read_packet(AVFormatContext *s,
if(lpcm_header_len == 6) {
codec_id = AV_CODEC_ID_MLP;
} else {
/* 16 bit form will be handled as AV_CODEC_ID_PCM_S16BE */
codec_id = AV_CODEC_ID_PCM_DVD;
}
} else if (startcode >= 0xb0 && startcode <= 0xbf) {
@ -570,7 +569,6 @@ static int mpegps_read_packet(AVFormatContext *s,
st->codec->sample_rate = 8000;
}
st->request_probe = request_probe;
if (codec_id != AV_CODEC_ID_PCM_S16BE)
st->need_parsing = AVSTREAM_PARSE_FULL;
found:
if(st->discard >= AVDISCARD_ALL)
@ -581,28 +579,6 @@ static int mpegps_read_packet(AVFormatContext *s,
goto skip;
avio_skip(s->pb, 6);
len -=6;
} else {
int b1, freq;
/* for LPCM, we just skip the header and consider it is raw
audio data */
if (len <= 3)
goto skip;
avio_r8(s->pb); /* emphasis (1), muse(1), reserved(1), frame number(5) */
b1 = avio_r8(s->pb); /* quant (2), freq(2), reserved(1), channels(3) */
avio_r8(s->pb); /* dynamic range control (0x80 = off) */
len -= 3;
freq = (b1 >> 4) & 3;
st->codec->sample_rate = lpcm_freq_tab[freq];
st->codec->channels = 1 + (b1 & 7);
st->codec->bits_per_coded_sample = 16 + ((b1 >> 6) & 3) * 4;
st->codec->bit_rate = st->codec->channels *
st->codec->sample_rate *
st->codec->bits_per_coded_sample;
if (st->codec->bits_per_coded_sample == 16)
st->codec->codec_id = AV_CODEC_ID_PCM_S16BE;
else if (st->codec->bits_per_coded_sample == 28)
return AVERROR(EINVAL);
}
}
ret = av_get_packet(s->pb, pkt, len);