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 
22 #include "avcodec.h"
23 #include "bytestream.h"
24 #include "codec_internal.h"
25 #include "encode.h"
26 
27 typedef struct BlurayPCMEncContext {
28  uint16_t header; // Header added to every frame
30 
32 {
34  uint8_t ch_layout;
35  int quant, freq, frame_size;
36 
37  switch (avctx->sample_fmt) {
38  case AV_SAMPLE_FMT_S16:
39  avctx->bits_per_coded_sample = 16;
40  frame_size = 240;
41  quant = 1;
42  break;
43  case AV_SAMPLE_FMT_S32:
44  frame_size = 360;
45  avctx->bits_per_coded_sample = 24;
46  quant = 3;
47  break;
48  default:
49  return AVERROR_BUG;
50  }
51 
52  switch (avctx->sample_rate) {
53  case 48000:
54  freq = 1;
55  break;
56  case 96000:
57  freq = 4;
58  break;
59  case 192000:
60  freq = 5;
61  break;
62  default:
63  return AVERROR_BUG;
64  }
65 
66  switch (av_channel_layout_subset(&avctx->ch_layout, ~(uint64_t)0)) {
67  case AV_CH_LAYOUT_MONO:
68  ch_layout = 1;
69  break;
71  ch_layout = 3;
72  break;
74  ch_layout = 4;
75  break;
76  case AV_CH_LAYOUT_2_1:
77  ch_layout = 5;
78  break;
80  ch_layout = 6;
81  break;
82  case AV_CH_LAYOUT_2_2:
83  ch_layout = 7;
84  break;
86  ch_layout = 8;
87  break;
89  ch_layout = 9;
90  break;
92  ch_layout = 10;
93  break;
95  ch_layout = 11;
96  break;
97  default:
98  return AVERROR_BUG;
99  }
100 
101  s->header = (((ch_layout << 4) | freq) << 8) | (quant << 6);
102  avctx->frame_size = frame_size;
103 
104  return 0;
105 }
106 
108  const AVFrame *frame, int *got_packet_ptr)
109 {
110  BlurayPCMEncContext *s = avctx->priv_data;
111  int sample_size, samples, channel, num_dest_channels;
112  const int16_t *src16;
113  const int32_t *src32;
114  unsigned pkt_size;
115  PutByteContext pb;
116  int ret;
117 
118  num_dest_channels = FFALIGN(avctx->ch_layout.nb_channels, 2);
119  sample_size = (num_dest_channels *
120  (avctx->sample_fmt == AV_SAMPLE_FMT_S16 ? 16 : 24)) >> 3;
121  samples = frame->nb_samples;
122 
123  pkt_size = sample_size * samples + 4;
124 
125  if ((ret = ff_get_encode_buffer(avctx, avpkt, pkt_size, 0)) < 0)
126  return ret;
127 
128  AV_WB16(avpkt->data, pkt_size - 4);
129  AV_WB16(avpkt->data + 2, s->header);
130 
131  src16 = (const int16_t *)frame->data[0];
132  src32 = (const int32_t *)frame->data[0];
133 
134  bytestream2_init_writer(&pb, avpkt->data + 4, avpkt->size - 4);
135 
136  switch (avctx->ch_layout.u.mask) {
137  /* cases with same number of source and coded channels */
138  case AV_CH_LAYOUT_STEREO:
140  case AV_CH_LAYOUT_2_2:
141  samples *= num_dest_channels;
142  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
143 #if HAVE_BIGENDIAN
144  bytestream2_put_bufferu(&pb, frame->data[0], samples * 2);
145 #else
146  do {
147  bytestream2_put_be16u(&pb, *src16++);
148  } while (--samples);
149 #endif
150  } else {
151  do {
152  bytestream2_put_be24u(&pb, (*src32++) >> 8);
153  } while (--samples);
154  }
155  break;
156  /* cases where number of source channels = coded channels + 1 */
157  case AV_CH_LAYOUT_MONO:
159  case AV_CH_LAYOUT_2_1:
161  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
162  do {
163 #if HAVE_BIGENDIAN
164  bytestream2_put_bufferu(&pb, (const uint8_t *)src16, avctx->ch_layout.nb_channels * 2);
165  src16 += avctx->ch_layout.nb_channels;
166 #else
167  channel = avctx->ch_layout.nb_channels;
168  do {
169  bytestream2_put_be16u(&pb, *src16++);
170  } while (--channel);
171 #endif
172  bytestream2_put_ne16(&pb, 0);
173  } while (--samples);
174  } else {
175  do {
176  channel = avctx->ch_layout.nb_channels;
177  do {
178  bytestream2_put_be24u(&pb, (*src32++) >> 8);
179  } while (--channel);
180  bytestream2_put_ne24(&pb, 0);
181  } while (--samples);
182  }
183  break;
184  /* remapping: L, R, C, LBack, RBack, LF */
186  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
187  do {
188  bytestream2_put_be16u(&pb, src16[0]);
189  bytestream2_put_be16u(&pb, src16[1]);
190  bytestream2_put_be16u(&pb, src16[2]);
191  bytestream2_put_be16u(&pb, src16[4]);
192  bytestream2_put_be16u(&pb, src16[5]);
193  bytestream2_put_be16u(&pb, src16[3]);
194  src16 += 6;
195  } while (--samples);
196  } else {
197  do {
198  bytestream2_put_be24u(&pb, src32[0] >> 8);
199  bytestream2_put_be24u(&pb, src32[1] >> 8);
200  bytestream2_put_be24u(&pb, src32[2] >> 8);
201  bytestream2_put_be24u(&pb, src32[4] >> 8);
202  bytestream2_put_be24u(&pb, src32[5] >> 8);
203  bytestream2_put_be24u(&pb, src32[3] >> 8);
204  src32 += 6;
205  } while (--samples);
206  }
207  break;
208  /* remapping: L, R, C, LSide, LBack, RBack, RSide, <unused> */
210  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
211  do {
212  bytestream2_put_be16u(&pb, src16[0]);
213  bytestream2_put_be16u(&pb, src16[1]);
214  bytestream2_put_be16u(&pb, src16[2]);
215  bytestream2_put_be16u(&pb, src16[5]);
216  bytestream2_put_be16u(&pb, src16[3]);
217  bytestream2_put_be16u(&pb, src16[4]);
218  bytestream2_put_be16u(&pb, src16[6]);
219  src16 += 7;
220  bytestream2_put_ne16(&pb, 0);
221  } while (--samples);
222  } else {
223  do {
224  bytestream2_put_be24u(&pb, src32[0] >> 8);
225  bytestream2_put_be24u(&pb, src32[1] >> 8);
226  bytestream2_put_be24u(&pb, src32[2] >> 8);
227  bytestream2_put_be24u(&pb, src32[5] >> 8);
228  bytestream2_put_be24u(&pb, src32[3] >> 8);
229  bytestream2_put_be24u(&pb, src32[4] >> 8);
230  bytestream2_put_be24u(&pb, src32[6] >> 8);
231  src32 += 7;
232  bytestream2_put_ne24(&pb, 0);
233  } while (--samples);
234  }
235  break;
236  /* remapping: L, R, C, LSide, LBack, RBack, RSide, LF */
238  if (AV_SAMPLE_FMT_S16 == avctx->sample_fmt) {
239  do {
240  bytestream2_put_be16u(&pb, src16[0]);
241  bytestream2_put_be16u(&pb, src16[1]);
242  bytestream2_put_be16u(&pb, src16[2]);
243  bytestream2_put_be16u(&pb, src16[6]);
244  bytestream2_put_be16u(&pb, src16[4]);
245  bytestream2_put_be16u(&pb, src16[5]);
246  bytestream2_put_be16u(&pb, src16[7]);
247  bytestream2_put_be16u(&pb, src16[3]);
248  src16 += 8;
249  } while (--samples);
250  } else {
251  do {
252  bytestream2_put_be24u(&pb, src32[0]);
253  bytestream2_put_be24u(&pb, src32[1]);
254  bytestream2_put_be24u(&pb, src32[2]);
255  bytestream2_put_be24u(&pb, src32[6]);
256  bytestream2_put_be24u(&pb, src32[4]);
257  bytestream2_put_be24u(&pb, src32[5]);
258  bytestream2_put_be24u(&pb, src32[7]);
259  bytestream2_put_be24u(&pb, src32[3]);
260  src32 += 8;
261  } while (--samples);
262  }
263  break;
264  default:
265  return AVERROR_BUG;
266  }
267 
268  *got_packet_ptr = 1;
269 
270  return 0;
271 }
272 
274  .p.name = "pcm_bluray",
275  CODEC_LONG_NAME("PCM signed 16|20|24-bit big-endian for Blu-ray media"),
276  .p.type = AVMEDIA_TYPE_AUDIO,
277  .p.id = AV_CODEC_ID_PCM_BLURAY,
278  .priv_data_size = sizeof(BlurayPCMEncContext),
281  .p.supported_samplerates = (const int[]) { 48000, 96000, 192000, 0 },
293  .p.ch_layouts = (const AVChannelLayout[]) {
304  { 0 } },
305  .p.sample_fmts = (const enum AVSampleFormat[]) {
307  .p.capabilities = AV_CODEC_CAP_DR1,
308 };
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:1035
AV_CODEC_ID_PCM_BLURAY
@ AV_CODEC_ID_PCM_BLURAY
Definition: codec_id.h:349
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:1007
AV_CHANNEL_LAYOUT_5POINT1
#define AV_CHANNEL_LAYOUT_5POINT1
Definition: channel_layout.h:367
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:107
AVPacket::data
uint8_t * data
Definition: packet.h:374
AV_CHANNEL_LAYOUT_4POINT0
#define AV_CHANNEL_LAYOUT_4POINT0
Definition: channel_layout.h:362
encode.h
BlurayPCMEncContext::header
uint16_t header
Definition: pcm-blurayenc.c:28
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:356
FFCodec
Definition: codec_internal.h:119
av_channel_layout_subset
uint64_t av_channel_layout_subset(const AVChannelLayout *channel_layout, uint64_t mask)
Find out what channels from a given set are present in a channel layout, without regard for their pos...
Definition: channel_layout.c:986
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:357
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:325
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:303
AV_CHANNEL_LAYOUT_5POINT0
#define AV_CHANNEL_LAYOUT_5POINT0
Definition: channel_layout.h:366
AV_CHANNEL_LAYOUT_7POINT0
#define AV_CHANNEL_LAYOUT_7POINT0
Definition: channel_layout.h:376
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:123
AVCodecContext::ch_layout
AVChannelLayout ch_layout
Audio channel layout.
Definition: avcodec.h:2059
AV_CHANNEL_LAYOUT_SURROUND
#define AV_CHANNEL_LAYOUT_SURROUND
Definition: channel_layout.h:360
FF_CODEC_ENCODE_CB
#define FF_CODEC_ENCODE_CB(func)
Definition: codec_internal.h:307
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
av_cold
#define av_cold
Definition: attributes.h:90
AV_CHANNEL_LAYOUT_2_2
#define AV_CHANNEL_LAYOUT_2_2
Definition: channel_layout.h:364
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:27
frame_size
int frame_size
Definition: mxfenc.c:2202
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts_bsf.c:363
CODEC_OLD_CHANNEL_LAYOUTS
#define CODEC_OLD_CHANNEL_LAYOUTS(...)
Definition: codec_internal.h:294
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:264
AV_CH_LAYOUT_2_1
#define AV_CH_LAYOUT_2_1
Definition: channel_layout.h:207
AV_WB16
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
AVChannelLayout::u
union AVChannelLayout::@307 u
Details about which channels are present in this layout.
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:31
AV_CHANNEL_LAYOUT_7POINT1
#define AV_CHANNEL_LAYOUT_7POINT1
Definition: channel_layout.h:378
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
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:293
codec_internal.h
AV_CHANNEL_LAYOUT_2_1
#define AV_CHANNEL_LAYOUT_2_1
Definition: channel_layout.h:359
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1023
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:273
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:1444
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_7POINT1
Definition: channel_layout.h:226
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:211
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:398
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:425
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