FFmpeg
pcm-blurayenc.c
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1 /*
2  * LPCM codecs for PCM formats found in Blu-ray m2ts streams
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/channel_layout.h"
22 #include "avcodec.h"
23 #include "bytestream.h"
24 #include "codec_internal.h"
25 #include "encode.h"
26 #include "internal.h"
27 
28 typedef struct BlurayPCMEncContext {
29  uint16_t header; // Header added to every frame
30 } BlurayPCMEncContext;
31 
32 static av_cold int pcm_bluray_encode_init(AVCodecContext *avctx)
33 {
34  BlurayPCMEncContext *s = avctx->priv_data;
35  uint8_t ch_layout;
36  int quant, freq, frame_size;
37 
38  switch (avctx->sample_fmt) {
39  case AV_SAMPLE_FMT_S16:
40  avctx->bits_per_coded_sample = 16;
41  frame_size = 240;
42  quant = 1;
43  break;
44  case AV_SAMPLE_FMT_S32:
45  frame_size = 360;
46  avctx->bits_per_coded_sample = 24;
47  quant = 3;
48  break;
49  default:
50  return AVERROR_BUG;
51  }
52 
53  switch (avctx->sample_rate) {
54  case 48000:
55  freq = 1;
56  break;
57  case 96000:
58  freq = 4;
59  break;
60  case 192000:
61  freq = 5;
62  break;
63  default:
64  return AVERROR_BUG;
65  }
66 
67  switch (avctx->ch_layout.u.mask) {
68  case AV_CH_LAYOUT_MONO:
69  ch_layout = 1;
70  break;
71  case AV_CH_LAYOUT_STEREO:
72  ch_layout = 3;
73  break;
74  case AV_CH_LAYOUT_SURROUND:
75  ch_layout = 4;
76  break;
77  case AV_CH_LAYOUT_2_1:
78  ch_layout = 5;
79  break;
80  case AV_CH_LAYOUT_4POINT0:
81  ch_layout = 6;
82  break;
83  case AV_CH_LAYOUT_2_2:
84  ch_layout = 7;
85  break;
86  case AV_CH_LAYOUT_5POINT0:
87  ch_layout = 8;
88  break;
89  case AV_CH_LAYOUT_5POINT1:
90  ch_layout = 9;
91  break;
92  case AV_CH_LAYOUT_7POINT0:
93  ch_layout = 10;
94  break;
95  case AV_CH_LAYOUT_7POINT1:
96  ch_layout = 11;
97  break;
98  default:
99  return AVERROR_BUG;
100  }
101 
102  s->header = (((ch_layout << 4) | freq) << 8) | (quant << 6);
103  avctx->frame_size = frame_size;
104 
105  return 0;
106 }
107 
108 static int pcm_bluray_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
109  const AVFrame *frame, int *got_packet_ptr)
110 {
111  BlurayPCMEncContext *s = avctx->priv_data;
112  int sample_size, samples, channel, num_dest_channels;
113  const int16_t *src16;
114  const int32_t *src32;
115  unsigned pkt_size;
116  PutByteContext pb;
117  int ret;
118 
119  num_dest_channels = FFALIGN(avctx->ch_layout.nb_channels, 2);
120  sample_size = (num_dest_channels *
121  (avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
122  samples = frame->nb_samples;
123 
124  pkt_size = sample_size * samples + 4;
125 
126  if ((ret = ff_get_encode_buffer(avctx, avpkt, pkt_size, 0)) < 0)
127  return ret;
128 
129  AV_WB16(avpkt->data, pkt_size - 4);
130  AV_WB16(avpkt->data + 2, s->header);
131 
132  src16 = (const int16_t *)frame->data[0];
133  src32 = (const int32_t *)frame->data[0];
134 
135  bytestream2_init_writer(&pb, avpkt->data + 4, avpkt->size - 4);
136 
137  switch (avctx->ch_layout.u.mask) {
138  /* cases with same number of source and coded channels */
139  case AV_CH_LAYOUT_STEREO:
140  case AV_CH_LAYOUT_4POINT0:
141  case AV_CH_LAYOUT_2_2:
142  samples *= num_dest_channels;
143  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
144 #if HAVE_BIGENDIAN
145  bytestream2_put_bufferu(&pb, frame->data[0], samples * 2);
146 #else
147  do {
148  bytestream2_put_be16u(&pb, *src16++);
149  } while (--samples);
150 #endif
151  } else {
152  do {
153  bytestream2_put_be24u(&pb, (*src32++) >> 8);
154  } while (--samples);
155  }
156  break;
157  /* cases where number of source channels = coded channels + 1 */
158  case AV_CH_LAYOUT_MONO:
159  case AV_CH_LAYOUT_SURROUND:
160  case AV_CH_LAYOUT_2_1:
161  case AV_CH_LAYOUT_5POINT0:
162  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
163  do {
164 #if HAVE_BIGENDIAN
165  bytestream2_put_bufferu(&pb, (const uint8_t *)src16, avctx->ch_layout.nb_channels * 2);
166  src16 += avctx->ch_layout.nb_channels;
167 #else
168  channel = avctx->ch_layout.nb_channels;
169  do {
170  bytestream2_put_be16u(&pb, *src16++);
171  } while (--channel);
172 #endif
173  bytestream2_put_ne16(&pb, 0);
174  } while (--samples);
175  } else {
176  do {
177  channel = avctx->ch_layout.nb_channels;
178  do {
179  bytestream2_put_be24u(&pb, (*src32++) >> 8);
180  } while (--channel);
181  bytestream2_put_ne24(&pb, 0);
182  } while (--samples);
183  }
184  break;
185  /* remapping: L, R, C, LBack, RBack, LF */
186  case AV_CH_LAYOUT_5POINT1:
187  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
188  do {
189  bytestream2_put_be16u(&pb, src16[0]);
190  bytestream2_put_be16u(&pb, src16[1]);
191  bytestream2_put_be16u(&pb, src16[2]);
192  bytestream2_put_be16u(&pb, src16[4]);
193  bytestream2_put_be16u(&pb, src16[5]);
194  bytestream2_put_be16u(&pb, src16[3]);
195  src16 += 6;
196  } while (--samples);
197  } else {
198  do {
199  bytestream2_put_be24u(&pb, src32[0] >> 8);
200  bytestream2_put_be24u(&pb, src32[1] >> 8);
201  bytestream2_put_be24u(&pb, src32[2] >> 8);
202  bytestream2_put_be24u(&pb, src32[4] >> 8);
203  bytestream2_put_be24u(&pb, src32[5] >> 8);
204  bytestream2_put_be24u(&pb, src32[3] >> 8);
205  src32 += 6;
206  } while (--samples);
207  }
208  break;
209  /* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */
210  case AV_CH_LAYOUT_7POINT0:
211  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
212  do {
213  bytestream2_put_be16u(&pb, src16[0]);
214  bytestream2_put_be16u(&pb, src16[1]);
215  bytestream2_put_be16u(&pb, src16[2]);
216  bytestream2_put_be16u(&pb, src16[5]);
217  bytestream2_put_be16u(&pb, src16[3]);
218  bytestream2_put_be16u(&pb, src16[4]);
219  bytestream2_put_be16u(&pb, src16[6]);
220  src16 += 7;
221  bytestream2_put_ne16(&pb, 0);
222  } while (--samples);
223  } else {
224  do {
225  bytestream2_put_be24u(&pb, src32[0] >> 8);
226  bytestream2_put_be24u(&pb, src32[1] >> 8);
227  bytestream2_put_be24u(&pb, src32[2] >> 8);
228  bytestream2_put_be24u(&pb, src32[5] >> 8);
229  bytestream2_put_be24u(&pb, src32[3] >> 8);
230  bytestream2_put_be24u(&pb, src32[4] >> 8);
231  bytestream2_put_be24u(&pb, src32[6] >> 8);
232  src32 += 7;
233  bytestream2_put_ne24(&pb, 0);
234  } while (--samples);
235  }
236  break;
237  /* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */
238  case AV_CH_LAYOUT_7POINT1:
239  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
240  do {
241  bytestream2_put_be16u(&pb, src16[0]);
242  bytestream2_put_be16u(&pb, src16[1]);
243  bytestream2_put_be16u(&pb, src16[2]);
244  bytestream2_put_be16u(&pb, src16[6]);
245  bytestream2_put_be16u(&pb, src16[4]);
246  bytestream2_put_be16u(&pb, src16[5]);
247  bytestream2_put_be16u(&pb, src16[7]);
248  bytestream2_put_be16u(&pb, src16[3]);
249  src16 += 8;
250  } while (--samples);
251  } else {
252  do {
253  bytestream2_put_be24u(&pb, src32[0]);
254  bytestream2_put_be24u(&pb, src32[1]);
255  bytestream2_put_be24u(&pb, src32[2]);
256  bytestream2_put_be24u(&pb, src32[6]);
257  bytestream2_put_be24u(&pb, src32[4]);
258  bytestream2_put_be24u(&pb, src32[5]);
259  bytestream2_put_be24u(&pb, src32[7]);
260  bytestream2_put_be24u(&pb, src32[3]);
261  src32 += 8;
262  } while (--samples);
263  }
264  break;
265  default:
266  return AVERROR_BUG;
267  }
268 
269  avpkt->pts = frame->pts;
270  avpkt->duration = ff_samples_to_time_base(avctx, frame->nb_samples);
271  *got_packet_ptr = 1;
272 
273  return 0;
274 }
275 
276 const FFCodec ff_pcm_bluray_encoder = {
277  .p.name = "pcm_bluray",
278  .p.long_name = NULL_IF_CONFIG_SMALL("PCM signed 16|20|24-bit big-endian for Blu-ray media"),
279  .p.type = AVMEDIA_TYPE_AUDIO,
280  .p.id = AV_CODEC_ID_PCM_BLURAY,
281  .priv_data_size = sizeof(BlurayPCMEncContext),
282  .init = pcm_bluray_encode_init,
283  FF_CODEC_ENCODE_CB(pcm_bluray_encode_frame),
284  .p.supported_samplerates = (const int[]) { 48000, 96000, 192000, 0 },
285 #if FF_API_OLD_CHANNEL_LAYOUT
286  .p.channel_layouts = (const uint64_t[]) {
287  AV_CH_LAYOUT_MONO,
288  AV_CH_LAYOUT_STEREO,
289  AV_CH_LAYOUT_SURROUND,
290  AV_CH_LAYOUT_2_1,
291  AV_CH_LAYOUT_4POINT0,
292  AV_CH_LAYOUT_2_2,
293  AV_CH_LAYOUT_5POINT0,
294  AV_CH_LAYOUT_5POINT1,
295  AV_CH_LAYOUT_7POINT0,
296  AV_CH_LAYOUT_7POINT1,
297  0 },
298 #endif
299  .p.ch_layouts = (const AVChannelLayout[]) {
300  AV_CHANNEL_LAYOUT_MONO,
301  AV_CHANNEL_LAYOUT_STEREO,
302  AV_CHANNEL_LAYOUT_SURROUND,
303  AV_CHANNEL_LAYOUT_2_1,
304  AV_CHANNEL_LAYOUT_4POINT0,
305  AV_CHANNEL_LAYOUT_2_2,
306  AV_CHANNEL_LAYOUT_5POINT0,
307  AV_CHANNEL_LAYOUT_5POINT1,
308  AV_CHANNEL_LAYOUT_7POINT0,
309  AV_CHANNEL_LAYOUT_7POINT1,
310  { 0 } },
311  .p.sample_fmts = (const enum AVSampleFormat[]) {
312  AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_NONE },
313  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
314  .p.capabilities = AV_CODEC_CAP_DR1,
315 };
AV_CH_LAYOUT_7POINT0
#define AV_CH_LAYOUT_7POINT0
Definition: channel_layout.h:224
AVCodecContext::frame_size
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:1026
AV_CODEC_ID_PCM_BLURAY
@ AV_CODEC_ID_PCM_BLURAY
Definition: codec_id.h:342
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:998
AV_CHANNEL_LAYOUT_5POINT1
#define AV_CHANNEL_LAYOUT_5POINT1
Definition: channel_layout.h:364
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:204
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
pcm_bluray_encode_frame
static int pcm_bluray_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: pcm-blurayenc.c:108
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CHANNEL_LAYOUT_4POINT0
#define AV_CHANNEL_LAYOUT_4POINT0
Definition: channel_layout.h:359
encode.h
BlurayPCMEncContext::header
uint16_t header
Definition: pcm-blurayenc.c:29
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:353
FFCodec
Definition: codec_internal.h:112
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:354
AVChannelLayout::mask
uint64_t mask
This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used for AV_CHANNEL_ORDER_AMBISONIC ...
Definition: channel_layout.h:322
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:300
AV_CHANNEL_LAYOUT_5POINT0
#define AV_CHANNEL_LAYOUT_5POINT0
Definition: channel_layout.h:363
init
static int init
Definition: av_tx.c:47
AV_CHANNEL_LAYOUT_7POINT0
#define AV_CHANNEL_LAYOUT_7POINT0
Definition: channel_layout.h:373
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:116
AVCodecContext::ch_layout
AVChannelLayout ch_layout
Audio channel layout.
Definition: avcodec.h:2056
AV_CHANNEL_LAYOUT_SURROUND
#define AV_CHANNEL_LAYOUT_SURROUND
Definition: channel_layout.h:357
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:263
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:205
quant
static int quant(float coef, const float Q, const float rounding)
Quantize one coefficient.
Definition: aacenc_utils.h:59
ff_samples_to_time_base
static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx, int64_t samples)
Rescale from sample rate to AVCodecContext.time_base.
Definition: internal.h:173
av_cold
#define av_cold
Definition: attributes.h:90
AV_CHANNEL_LAYOUT_2_2
#define AV_CHANNEL_LAYOUT_2_2
Definition: channel_layout.h:361
bytestream2_init_writer
static av_always_inline void bytestream2_init_writer(PutByteContext *p, uint8_t *buf, int buf_size)
Definition: bytestream.h:147
bytestream2_put_ne24
#define bytestream2_put_ne24
Definition: bytestream.h:128
s
#define s(width, name)
Definition: cbs_vp9.c:256
BlurayPCMEncContext
Definition: pcm-blurayenc.c:28
frame_size
int frame_size
Definition: mxfenc.c:2201
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CH_LAYOUT_2_1
#define AV_CH_LAYOUT_2_1
Definition: channel_layout.h:207
AVChannelLayout::u
union AVChannelLayout::@296 u
Details about which channels are present in this layout.
AV_WB16
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
AV_CH_LAYOUT_5POINT1
#define AV_CH_LAYOUT_5POINT1
Definition: channel_layout.h:215
pcm_bluray_encode_init
static av_cold int pcm_bluray_encode_init(AVCodecContext *avctx)
Definition: pcm-blurayenc.c:32
AV_CHANNEL_LAYOUT_7POINT1
#define AV_CHANNEL_LAYOUT_7POINT1
Definition: channel_layout.h:375
PutByteContext
Definition: bytestream.h:37
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:290
codec_internal.h
AV_CHANNEL_LAYOUT_2_1
#define AV_CHANNEL_LAYOUT_2_1
Definition: channel_layout.h:356
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1014
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
ff_pcm_bluray_encoder
const FFCodec ff_pcm_bluray_encoder
Definition: pcm-blurayenc.c:276
AV_CH_LAYOUT_5POINT0
#define AV_CH_LAYOUT_5POINT0
Definition: channel_layout.h:214
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1441
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_7POINT1
Definition: channel_layout.h:226
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: codec_internal.h:31
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:58
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:203
avcodec.h
bytestream2_put_ne16
#define bytestream2_put_ne16
Definition: bytestream.h:127
ret
ret
Definition: filter_design.txt:187
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AV_CH_LAYOUT_SURROUND
#define AV_CH_LAYOUT_SURROUND
Definition: channel_layout.h:208
AVCodecContext
main external API structure.
Definition: avcodec.h:389
channel_layout.h
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:79
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
bytestream2_put_bufferu
static av_always_inline unsigned int bytestream2_put_bufferu(PutByteContext *p, const uint8_t *src, unsigned int size)
Definition: bytestream.h:301
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVPacket
This structure stores compressed data.
Definition: packet.h:351
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:416
AV_CH_LAYOUT_4POINT0
#define AV_CH_LAYOUT_4POINT0
Definition: channel_layout.h:210
int32_t
int32_t
Definition: audioconvert.c:56
bytestream.h
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
AV_SAMPLE_FMT_S32
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:59
AV_CH_LAYOUT_2_2
#define AV_CH_LAYOUT_2_2
Definition: channel_layout.h:212
channel
channel
Definition: ebur128.h:39
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