mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
298 lines
9.8 KiB
C
298 lines
9.8 KiB
C
/*
|
|
* LPCM codecs for PCM formats found in Blu-ray m2ts streams
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "avcodec.h"
|
|
#include "bytestream.h"
|
|
#include "codec_internal.h"
|
|
#include "encode.h"
|
|
|
|
typedef struct BlurayPCMEncContext {
|
|
uint16_t header; // Header added to every frame
|
|
} BlurayPCMEncContext;
|
|
|
|
static av_cold int pcm_bluray_encode_init(AVCodecContext *avctx)
|
|
{
|
|
BlurayPCMEncContext *s = avctx->priv_data;
|
|
uint8_t ch_layout;
|
|
int quant, freq, frame_size;
|
|
|
|
switch (avctx->sample_fmt) {
|
|
case AV_SAMPLE_FMT_S16:
|
|
avctx->bits_per_coded_sample = 16;
|
|
frame_size = 240;
|
|
quant = 1;
|
|
break;
|
|
case AV_SAMPLE_FMT_S32:
|
|
frame_size = 360;
|
|
avctx->bits_per_coded_sample = 24;
|
|
quant = 3;
|
|
break;
|
|
default:
|
|
return AVERROR_BUG;
|
|
}
|
|
|
|
switch (avctx->sample_rate) {
|
|
case 48000:
|
|
freq = 1;
|
|
break;
|
|
case 96000:
|
|
freq = 4;
|
|
break;
|
|
case 192000:
|
|
freq = 5;
|
|
break;
|
|
default:
|
|
return AVERROR_BUG;
|
|
}
|
|
|
|
switch (av_channel_layout_subset(&avctx->ch_layout, ~(uint64_t)0)) {
|
|
case AV_CH_LAYOUT_MONO:
|
|
ch_layout = 1;
|
|
break;
|
|
case AV_CH_LAYOUT_STEREO:
|
|
ch_layout = 3;
|
|
break;
|
|
case AV_CH_LAYOUT_SURROUND:
|
|
ch_layout = 4;
|
|
break;
|
|
case AV_CH_LAYOUT_2_1:
|
|
ch_layout = 5;
|
|
break;
|
|
case AV_CH_LAYOUT_4POINT0:
|
|
ch_layout = 6;
|
|
break;
|
|
case AV_CH_LAYOUT_2_2:
|
|
ch_layout = 7;
|
|
break;
|
|
case AV_CH_LAYOUT_5POINT0:
|
|
ch_layout = 8;
|
|
break;
|
|
case AV_CH_LAYOUT_5POINT1:
|
|
ch_layout = 9;
|
|
break;
|
|
case AV_CH_LAYOUT_7POINT0:
|
|
ch_layout = 10;
|
|
break;
|
|
case AV_CH_LAYOUT_7POINT1:
|
|
ch_layout = 11;
|
|
break;
|
|
default:
|
|
return AVERROR_BUG;
|
|
}
|
|
|
|
s->header = (((ch_layout << 4) | freq) << 8) | (quant << 6);
|
|
avctx->frame_size = frame_size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pcm_bluray_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
|
|
const AVFrame *frame, int *got_packet_ptr)
|
|
{
|
|
BlurayPCMEncContext *s = avctx->priv_data;
|
|
int sample_size, samples, channel, num_dest_channels;
|
|
const int16_t *src16;
|
|
const int32_t *src32;
|
|
unsigned pkt_size;
|
|
PutByteContext pb;
|
|
int ret;
|
|
|
|
num_dest_channels = FFALIGN(avctx->ch_layout.nb_channels, 2);
|
|
sample_size = (num_dest_channels *
|
|
(avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
|
|
samples = frame->nb_samples;
|
|
|
|
pkt_size = sample_size * samples + 4;
|
|
|
|
if ((ret = ff_get_encode_buffer(avctx, avpkt, pkt_size, 0)) < 0)
|
|
return ret;
|
|
|
|
AV_WB16(avpkt->data, pkt_size - 4);
|
|
AV_WB16(avpkt->data + 2, s->header);
|
|
|
|
src16 = (const int16_t *)frame->data[0];
|
|
src32 = (const int32_t *)frame->data[0];
|
|
|
|
bytestream2_init_writer(&pb, avpkt->data + 4, avpkt->size - 4);
|
|
|
|
switch (avctx->ch_layout.u.mask) {
|
|
/* cases with same number of source and coded channels */
|
|
case AV_CH_LAYOUT_STEREO:
|
|
case AV_CH_LAYOUT_4POINT0:
|
|
case AV_CH_LAYOUT_2_2:
|
|
samples *= num_dest_channels;
|
|
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
|
|
#if HAVE_BIGENDIAN
|
|
bytestream2_put_bufferu(&pb, frame->data[0], samples * 2);
|
|
#else
|
|
do {
|
|
bytestream2_put_be16u(&pb, *src16++);
|
|
} while (--samples);
|
|
#endif
|
|
} else {
|
|
do {
|
|
bytestream2_put_be24u(&pb, (*src32++) >> 8);
|
|
} while (--samples);
|
|
}
|
|
break;
|
|
/* cases where number of source channels = coded channels + 1 */
|
|
case AV_CH_LAYOUT_MONO:
|
|
case AV_CH_LAYOUT_SURROUND:
|
|
case AV_CH_LAYOUT_2_1:
|
|
case AV_CH_LAYOUT_5POINT0:
|
|
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
|
|
do {
|
|
#if HAVE_BIGENDIAN
|
|
bytestream2_put_bufferu(&pb, (const uint8_t *)src16, avctx->ch_layout.nb_channels * 2);
|
|
src16 += avctx->ch_layout.nb_channels;
|
|
#else
|
|
channel = avctx->ch_layout.nb_channels;
|
|
do {
|
|
bytestream2_put_be16u(&pb, *src16++);
|
|
} while (--channel);
|
|
#endif
|
|
bytestream2_put_ne16(&pb, 0);
|
|
} while (--samples);
|
|
} else {
|
|
do {
|
|
channel = avctx->ch_layout.nb_channels;
|
|
do {
|
|
bytestream2_put_be24u(&pb, (*src32++) >> 8);
|
|
} while (--channel);
|
|
bytestream2_put_ne24(&pb, 0);
|
|
} while (--samples);
|
|
}
|
|
break;
|
|
/* remapping: L, R, C, LBack, RBack, LF */
|
|
case AV_CH_LAYOUT_5POINT1:
|
|
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
|
|
do {
|
|
bytestream2_put_be16u(&pb, src16[0]);
|
|
bytestream2_put_be16u(&pb, src16[1]);
|
|
bytestream2_put_be16u(&pb, src16[2]);
|
|
bytestream2_put_be16u(&pb, src16[4]);
|
|
bytestream2_put_be16u(&pb, src16[5]);
|
|
bytestream2_put_be16u(&pb, src16[3]);
|
|
src16 += 6;
|
|
} while (--samples);
|
|
} else {
|
|
do {
|
|
bytestream2_put_be24u(&pb, src32[0] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[1] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[2] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[4] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[5] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[3] >> 8);
|
|
src32 += 6;
|
|
} while (--samples);
|
|
}
|
|
break;
|
|
/* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */
|
|
case AV_CH_LAYOUT_7POINT0:
|
|
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
|
|
do {
|
|
bytestream2_put_be16u(&pb, src16[0]);
|
|
bytestream2_put_be16u(&pb, src16[1]);
|
|
bytestream2_put_be16u(&pb, src16[2]);
|
|
bytestream2_put_be16u(&pb, src16[5]);
|
|
bytestream2_put_be16u(&pb, src16[3]);
|
|
bytestream2_put_be16u(&pb, src16[4]);
|
|
bytestream2_put_be16u(&pb, src16[6]);
|
|
src16 += 7;
|
|
bytestream2_put_ne16(&pb, 0);
|
|
} while (--samples);
|
|
} else {
|
|
do {
|
|
bytestream2_put_be24u(&pb, src32[0] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[1] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[2] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[5] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[3] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[4] >> 8);
|
|
bytestream2_put_be24u(&pb, src32[6] >> 8);
|
|
src32 += 7;
|
|
bytestream2_put_ne24(&pb, 0);
|
|
} while (--samples);
|
|
}
|
|
break;
|
|
/* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */
|
|
case AV_CH_LAYOUT_7POINT1:
|
|
if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
|
|
do {
|
|
bytestream2_put_be16u(&pb, src16[0]);
|
|
bytestream2_put_be16u(&pb, src16[1]);
|
|
bytestream2_put_be16u(&pb, src16[2]);
|
|
bytestream2_put_be16u(&pb, src16[6]);
|
|
bytestream2_put_be16u(&pb, src16[4]);
|
|
bytestream2_put_be16u(&pb, src16[5]);
|
|
bytestream2_put_be16u(&pb, src16[7]);
|
|
bytestream2_put_be16u(&pb, src16[3]);
|
|
src16 += 8;
|
|
} while (--samples);
|
|
} else {
|
|
do {
|
|
bytestream2_put_be24u(&pb, src32[0]);
|
|
bytestream2_put_be24u(&pb, src32[1]);
|
|
bytestream2_put_be24u(&pb, src32[2]);
|
|
bytestream2_put_be24u(&pb, src32[6]);
|
|
bytestream2_put_be24u(&pb, src32[4]);
|
|
bytestream2_put_be24u(&pb, src32[5]);
|
|
bytestream2_put_be24u(&pb, src32[7]);
|
|
bytestream2_put_be24u(&pb, src32[3]);
|
|
src32 += 8;
|
|
} while (--samples);
|
|
}
|
|
break;
|
|
default:
|
|
return AVERROR_BUG;
|
|
}
|
|
|
|
*got_packet_ptr = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
const FFCodec ff_pcm_bluray_encoder = {
|
|
.p.name = "pcm_bluray",
|
|
CODEC_LONG_NAME("PCM signed 16|20|24-bit big-endian for Blu-ray media"),
|
|
.p.type = AVMEDIA_TYPE_AUDIO,
|
|
.p.id = AV_CODEC_ID_PCM_BLURAY,
|
|
.priv_data_size = sizeof(BlurayPCMEncContext),
|
|
.init = pcm_bluray_encode_init,
|
|
FF_CODEC_ENCODE_CB(pcm_bluray_encode_frame),
|
|
.p.supported_samplerates = (const int[]) { 48000, 96000, 192000, 0 },
|
|
.p.ch_layouts = (const AVChannelLayout[]) {
|
|
AV_CHANNEL_LAYOUT_MONO,
|
|
AV_CHANNEL_LAYOUT_STEREO,
|
|
AV_CHANNEL_LAYOUT_SURROUND,
|
|
AV_CHANNEL_LAYOUT_2_1,
|
|
AV_CHANNEL_LAYOUT_4POINT0,
|
|
AV_CHANNEL_LAYOUT_2_2,
|
|
AV_CHANNEL_LAYOUT_5POINT0,
|
|
AV_CHANNEL_LAYOUT_5POINT1,
|
|
AV_CHANNEL_LAYOUT_7POINT0,
|
|
AV_CHANNEL_LAYOUT_7POINT1,
|
|
{ 0 } },
|
|
.p.sample_fmts = (const enum AVSampleFormat[]) {
|
|
AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_NONE },
|
|
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
|
|
};
|