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FFmpeg/libavcodec/pcm-blurayenc.c
Andreas Rheinhardt 0971fcf0a0 avcodec/codec_internal, all: Use macros to set deprecated AVCodec fields 
The aim of this is twofold: a) Clang warns when setting a deprecated
field in a definition and because several of the widely set
AVCodec fields are deprecated, one gets several hundred warnings
from Clang for an ordinary build. Yet fortunately Clang (unlike GCC)
allows to disable deprecation warnings inside a definition, so
that one can create simple macros to set these fields that also suppress
deprecation warnings for Clang. This has already been done in
fdff1b9cbf for AVCodec.channel_layouts.
b) Using macros will allow to easily migrate these fields to internal ones.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2025-03-10 00:57:23 +01:00

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/*
* 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),
CODEC_SAMPLERATES(48000, 96000, 192000),
CODEC_CH_LAYOUTS(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),
CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32),
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
};
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