27 #include "libavutil/channel_layout.h"
71 int buf_size = avpkt->
size;
74 if (buf_size < avctx->block_align) {
83 samples = (int16_t *)frame->
data[0];
108 memset(s, 0,
sizeof(*s));
111 #if CONFIG_GSM_DECODER
124 #if CONFIG_GSM_MS_DECODER
#define AVERROR_PATCHWELCOME
This structure describes decoded (raw) audio or video data.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_LOG_WARNING
Something somehow does not look correct.
static av_cold int init(AVCodecContext *avctx)
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
enum AVSampleFormat sample_fmt
audio sample format
const char * name
Name of the codec implementation.
#define GSM_MS_BLOCK_SIZE
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
bitstream reader API header.
static void gsm_flush(AVCodecContext *avctx)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Libavcodec external API header.
uint64_t channel_layout
Audio channel layout.
int bit_rate
the average bitrate
static av_cold int gsm_init(AVCodecContext *avctx)
static void flush(AVCodecContext *avctx)
int frame_size
Number of samples per channel in an audio frame.
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.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static int gsm_decode_block(AVCodecContext *avctx, int16_t *samples, GetBitContext *gb)
common internal api header.
static int gsm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
#define AVERROR_INVALIDDATA
as in Berlin toast format
int channels
number of audio channels
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
#define AV_CH_LAYOUT_MONO
int ff_msgsm_decode_block(AVCodecContext *avctx, int16_t *samples, const uint8_t *buf)
This structure stores compressed data.
int nb_samples
number of audio samples (per channel) described by this frame
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.