40 #if !CONFIG_HARDCODED_TABLES 42 #define INIT_ONCE(id, name) \ 43 case AV_CODEC_ID_PCM_ ## id: \ 44 if (CONFIG_PCM_ ## id ## _ENCODER) { \ 45 static AVOnce init_static_once = AV_ONCE_INIT; \ 46 ff_thread_once(&init_static_once, pcm_ ## name ## _tableinit); \ 74 #define ENCODE(type, endian, src, dst, n, shift, offset) \ 75 samples_ ## type = (const type *) src; \ 76 for (; n > 0; n--) { \ 77 register type v = (*samples_ ## type++ >> shift) + offset; \ 78 bytestream_put_ ## endian(&dst, v); \ 81 #define ENCODE_PLANAR(type, endian, dst, n, shift, offset) \ 82 n /= avctx->channels; \ 83 for (c = 0; c < avctx->channels; c++) { \ 85 samples_ ## type = (const type *) frame->extended_data[c]; \ 86 for (i = n; i > 0; i--) { \ 87 register type v = (*samples_ ## type++ >> shift) + offset; \ 88 bytestream_put_ ## endian(&dst, v); \ 95 int n,
c, sample_size, v,
ret;
99 const int16_t *samples_int16_t;
100 const int32_t *samples_int32_t;
101 const int64_t *samples_int64_t;
102 const uint16_t *samples_uint16_t;
103 const uint32_t *samples_uint32_t;
107 samples = (
const short *)frame->
data[0];
115 ENCODE(uint32_t,
le32, samples, dst, n, 0, 0x80000000)
118 ENCODE(uint32_t,
be32, samples, dst, n, 0, 0x80000000)
130 ENCODE(uint32_t,
le24, samples, dst, n, 8, 0x800000)
133 ENCODE(uint32_t,
be24, samples, dst, n, 8, 0x800000)
140 bytestream_put_be24(&dst, tmp);
145 ENCODE(uint16_t,
le16, samples, dst, n, 0, 0x8000)
148 ENCODE(uint16_t,
be16, samples, dst, n, 0, 0x8000)
201 memcpy(dst, samples, n * sample_size);
210 for (c = 0; c < avctx->
channels; c++) {
261 for (i = 0; i < 256; i++)
265 for (i = 0; i < 256; i++)
269 for (i = 0; i < 256; i++)
306 #define DECODE(size, endian, src, dst, n, shift, offset) \ 307 for (; n > 0; n--) { \ 308 uint ## size ## _t v = bytestream_get_ ## endian(&src); \ 309 AV_WN ## size ## A(dst, (uint ## size ## _t)(v - offset) << shift); \ 313 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \ 314 n /= avctx->channels; \ 315 for (c = 0; c < avctx->channels; c++) { \ 317 dst = frame->extended_data[c]; \ 318 for (i = n; i > 0; i--) { \ 319 uint ## size ## _t v = bytestream_get_ ## endian(&src); \ 320 AV_WN ## size ## A(dst, (uint ## size ##_t)(v - offset) << shift); \ 326 int *got_frame_ptr,
AVPacket *avpkt)
329 int buf_size = avpkt->
size;
332 int sample_size,
c, n,
ret, samples_per_block;
339 samples_per_block = 1;
342 samples_per_block = 2;
346 if (sample_size == 0) {
363 if (n && buf_size % n) {
366 "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
370 buf_size -= buf_size % n;
373 n = buf_size / sample_size;
379 samples = frame->
data[0];
383 DECODE(32,
le32, src, samples, n, 0, 0x80000000)
386 DECODE(32,
be32, src, samples, n, 0, 0x80000000)
398 DECODE(32,
le24, src, samples, n, 8, 0x800000)
401 DECODE(32,
be24, src, samples, n, 8, 0x800000)
405 uint32_t v = bytestream_get_be24(&src);
420 *samples++ = *src++ + 128;
424 for (c = 0; c < avctx->
channels; c++) {
427 for (i = n; i > 0; i--)
428 *samples++ = *src++ + 128;
480 memcpy(samples, src, n * sample_size);
489 for (c = 0; c < avctx->
channels; c++) {
506 for (c = 0; c < avctx->
channels; c++) {
508 for (i = 0; i < n; i++) {
510 *dst_int32_t++ = ((uint32_t)src[2]<<28) |
513 ((src[2] & 0x0F) << 8) |
516 *dst_int32_t++ = ((uint32_t)src[4]<<24) |
518 ((src[2] & 0xF0) << 8) |
543 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_) 544 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \ 545 AVCodec ff_ ## name_ ## _encoder = { \ 547 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ 548 .type = AVMEDIA_TYPE_AUDIO, \ 549 .id = AV_CODEC_ID_ ## id_, \ 550 .init = pcm_encode_init, \ 551 .encode2 = pcm_encode_frame, \ 552 .capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE, \ 553 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \ 554 AV_SAMPLE_FMT_NONE }, \ 555 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, \ 558 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \ 559 PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name) 560 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \ 561 PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) 562 #define PCM_ENCODER(id, sample_fmt, name, long_name) \ 563 PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name) 565 #define PCM_DECODER_0(id, sample_fmt, name, long_name) 566 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \ 567 AVCodec ff_ ## name_ ## _decoder = { \ 569 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ 570 .type = AVMEDIA_TYPE_AUDIO, \ 571 .id = AV_CODEC_ID_ ## id_, \ 572 .priv_data_size = sizeof(PCMDecode), \ 573 .init = pcm_decode_init, \ 574 .decode = pcm_decode_frame, \ 575 .capabilities = AV_CODEC_CAP_DR1, \ 576 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \ 577 AV_SAMPLE_FMT_NONE }, \ 578 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, \ 581 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \ 582 PCM_DECODER_ ## cf(id, sample_fmt, name, long_name) 583 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \ 584 PCM_DECODER_2(cf, id, sample_fmt, name, long_name) 585 #define PCM_DECODER(id, sample_fmt, name, long_name) \ 586 PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name) 588 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \ 589 PCM_ENCODER(id, sample_fmt_, name, long_name_); \ 590 PCM_DECODER(id, sample_fmt_, name, long_name_)
const struct AVCodec * codec
static av_cold int vidc2linear(unsigned char u_val)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
int64_t bit_rate
the average bitrate
const uint8_t ff_reverse[256]
#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)
static av_cold int ulaw2linear(unsigned char u_val)
static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Macro definitions for various function/variable attributes.
uint64_t_TMPL AV_WL64 unsigned int_TMPL le32
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
enum AVSampleFormat sample_fmt
audio sample format
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
static uint8_t linear_to_ulaw[16384]
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL be24
static int pcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
#define PCM_CODEC(id, sample_fmt_, name, long_name_)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
#define DECODE(size, endian, src, dst, n, shift, offset)
Read PCM samples macro.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL be64
#define ENCODE_PLANAR(type, endian, dst, n, shift, offset)
static float mul(float src0, float src1)
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL be16
#define ENCODE(type, endian, src, dst, n, shift, offset)
Write PCM samples macro.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL le24
static av_cold int pcm_encode_init(AVCodecContext *avctx)
static av_cold int alaw2linear(unsigned char a_val)
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
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
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
int frame_size
Number of samples per channel in an audio frame.
Libavcodec external API header.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_WB16 unsigned int_TMPL byte
int sample_rate
samples per second
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL be32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL le16
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float.
static av_cold int pcm_decode_init(AVCodecContext *avctx)
#define PCM_DECODER(id, sample_fmt, name, long_name)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
common internal api header.
#define INIT_ONCE(id, name)
static uint8_t linear_to_vidc[16384]
static uint8_t linear_to_alaw[16384]
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
int channels
number of audio channels
Filter the word “frame” indicates either a video frame or a group of audio samples
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
uint8_t ** extended_data
pointers to the data planes/channels.
This structure stores compressed data.
int nb_samples
number of audio samples (per channel) described by this frame