80 if (need32 || want32) {
155 return ret < 0 ? ret : 0;
167 int metadata_type, metadata_size,
ret;
198 int metadata_last, metadata_size;
199 const uint8_t *buf_end = buf + buf_size;
203 if (buf_end - buf < 4)
207 if (buf_end - buf < metadata_size) {
211 buf += metadata_size;
212 }
while (!metadata_last);
214 return buf_size - (buf_end -
buf);
219 int i, tmp, partition, method_type, rice_order;
220 int rice_bits, rice_esc;
224 if (method_type > 1) {
233 if (samples << rice_order != s->
blocksize) {
239 if (pred_order > samples) {
241 pred_order, samples);
245 rice_bits = 4 + method_type;
246 rice_esc = (1 << rice_bits) - 1;
248 decoded += pred_order;
250 for (partition = 0; partition < (1 << rice_order); partition++) {
252 if (tmp == rice_esc) {
254 for (; i < samples; i++)
257 for (; i < samples; i++) {
268 int pred_order,
int bps)
275 for (i = 0; i < pred_order; i++) {
283 a = decoded[pred_order-1];
285 b =
a - decoded[pred_order-2];
287 c =
b - decoded[pred_order-2] + decoded[pred_order-3];
289 d =
c - decoded[pred_order-2] + 2*decoded[pred_order-3] - decoded[pred_order-4];
291 switch (pred_order) {
295 for (i = pred_order; i < blocksize; i++)
296 decoded[i] =
a += decoded[i];
299 for (i = pred_order; i < blocksize; i++)
300 decoded[i] =
a +=
b += decoded[i];
303 for (i = pred_order; i < blocksize; i++)
304 decoded[i] =
a +=
b +=
c += decoded[i];
307 for (i = pred_order; i < blocksize; i++)
308 decoded[i] =
a +=
b +=
c += d += decoded[i];
319 int order,
int qlevel,
int len,
int bps)
322 int ebps = 1 << (bps-1);
325 for (i = order; i <
len; i++)
326 sigma |= decoded[i] + ebps;
331 for (i = len - 1; i >= order; i--) {
333 for (j = 0; j < order; j++)
334 p += coeffs[j] * (int64_t)decoded[i-order+j];
335 decoded[i] -= p >> qlevel;
337 for (i = order; i <
len; i++, decoded++) {
339 for (j = 0; j < order; j++)
340 p += coeffs[j] * (uint32_t)decoded[j];
341 decoded[j] += p >> qlevel;
349 int coeff_prec, qlevel;
353 for (i = 0; i < pred_order; i++) {
358 if (coeff_prec == 16) {
369 for (i = 0; i < pred_order; i++) {
370 coeffs[pred_order - i - 1] =
get_sbits(&s->
gb, coeff_prec);
378 && bps + coeff_prec +
av_log2(pred_order) <= 32)) {
392 int type, wasted = 0;
416 "Invalid number of wasted bits > available bits (%d) - left=%d\n",
433 }
else if (type == 1) {
436 }
else if ((type >= 8) && (type <= 12)) {
439 }
else if (type >= 32) {
450 decoded[i] <<= wasted;
509 " or frame header\n");
512 if (fi.samplerate == 0)
543 int *got_frame_ptr,
AVPacket *avpkt)
548 int buf_size = avpkt->
size;
561 if (buf_size > 5 && !memcmp(buf,
"\177FLAC", 5)) {
597 0, buf, bytes_read)) {
612 if (bytes_read > buf_size) {
616 if (bytes_read < buf_size) {
618 buf_size - bytes_read, buf_size);
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
static int get_sr_golomb_flac(GetBitContext *gb, int k, int limit, int esc_len)
read signed golomb rice code (flac).
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define LIBAVUTIL_VERSION_INT
static av_cold int init(AVCodecContext *avctx)
static int allocate_buffers(FLACContext *s)
int ff_flac_get_max_frame_size(int blocksize, int ch, int bps)
Calculate an estimate for the maximum frame size based on verbatim mode.
#define AV_OPT_FLAG_AUDIO_PARAM
AVCodecContext * avctx
parent AVCodecContext
#define FLAC_MAX_BLOCKSIZE
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
static int decode_residuals(FLACContext *s, int32_t *decoded, int pred_order)
FLACCOMMONINFO int blocksize
block size of the frame
static int get_sbits(GetBitContext *s, int n)
int ff_flac_is_extradata_valid(AVCodecContext *avctx, enum FLACExtradataFormat *format, uint8_t **streaminfo_start)
Validate the FLAC extradata.
static int get_sbits_long(GetBitContext *s, int n)
Read 0-32 bits as a signed integer.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
void(* lpc32)(int32_t *samples, const int coeffs[32], int order, int qlevel, int len)
enum AVSampleFormat sample_fmt
audio sample format
static const AVClass flac_decoder_class
Multithreading support functions.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
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_RB32
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
static void flac_set_bps(FLACContext *s)
static int get_bits_count(const GetBitContext *s)
bitstream reader API header.
unsigned int decoded_buffer_size
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
static int get_bits_left(GetBitContext *gb)
int32_t * decoded[FLAC_MAX_CHANNELS]
decoded samples
int ch_mode
channel decorrelation mode
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define AV_EF_EXPLODE
abort decoding on minor error detection
FLAC (Free Lossless Audio Codec) decoder/demuxer common functions.
enum AVSampleFormat request_sample_fmt
desired sample format
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
static int decode_subframe_lpc(FLACContext *s, int32_t *decoded, int pred_order, int bps)
simple assert() macros that are a bit more flexible than ISO C assert().
static int get_metadata_size(const uint8_t *buf, int buf_size)
Determine the size of an inline header.
GetBitContext gb
GetBitContext initialized to start at the current frame.
const char * name
Name of the codec implementation.
static void dump_headers(AVCodecContext *avctx, FLACStreaminfo *s)
int ff_flac_decode_frame_header(AVCodecContext *avctx, GetBitContext *gb, FLACFrameInfo *fi, int log_level_offset)
Validate and decode a frame header.
Libavcodec external API header.
static int decode_subframe_fixed(FLACContext *s, int32_t *decoded, int pred_order, int bps)
uint64_t channel_layout
Audio channel layout.
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
int buggy_lpc
use workaround for old lavc encoded files
int got_streaminfo
indicates if the STREAMINFO has been read
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
static void lpc_analyze_remodulate(int32_t *decoded, const int coeffs[32], int order, int qlevel, int len, int bps)
#define FLAC_STREAMINFO_SIZE
int sample_shift
shift required to make output samples 16-bit or 32-bit
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
AVSampleFormat
Audio sample formats.
int sample_rate
samples per second
static const AVOption options[]
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
static int decode_frame(FLACContext *s)
main external API structure.
void ff_flac_set_channel_layout(AVCodecContext *avctx)
static unsigned int get_bits1(GetBitContext *s)
void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s, const uint8_t *buffer)
Parse the Streaminfo metadata block.
Describe the class of an AVClass context structure.
av_cold void ff_flacdsp_init(FLACDSPContext *c, enum AVSampleFormat fmt, int channels, int bps)
static void skip_bits(GetBitContext *s, int n)
int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Get the required buffer size for the given audio parameters.
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
static av_always_inline void flac_parse_block_header(const uint8_t *block_header, int *last, int *type, int *size)
Parse the metadata block parameters from the header.
static int parse_streaminfo(FLACContext *s, const uint8_t *buf, int buf_size)
Parse the STREAMINFO from an inline header.
struct FLACStreaminfo flac_stream_info
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
int blocksize
number of samples in the current frame
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
static int decode_subframe(FLACContext *s, int channel)
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
void(* lpc16)(int32_t *samples, const int coeffs[32], int order, int qlevel, int len)
common internal api header.
#define CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
#define FLAC_MIN_FRAME_SIZE
#define AV_EF_CRCCHECK
Verify checksums embedded in the bitstream (could be of either encoded or decoded data...
#define MKBETAG(a, b, c, d)
int av_samples_fill_arrays(uint8_t **audio_data, int *linesize, const uint8_t *buf, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Fill plane data pointers and linesize for samples with sample format sample_fmt.
int channels
number of audio channels
#define AV_EF_COMPLIANT
consider all spec non compliances as errors
static const uint8_t * align_get_bits(GetBitContext *s)
static av_cold int flac_decode_init(AVCodecContext *avctx)
This structure stores compressed data.
int nb_samples
number of audio samples (per channel) described by this frame
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
void(* decorrelate[4])(uint8_t **out, int32_t **in, int channels, int len, int shift)
static int init_thread_copy(AVCodecContext *avctx)
#define FLAC_MAX_CHANNELS
static av_cold int flac_decode_close(AVCodecContext *avctx)
int ch_mode
channel decorrelation type in the current frame
static int flac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)