67 int buf_size = avpkt->
size;
82 "Frame too small (%d bytes). Truncated file?\n", buf_size);
104 refl_rms[1] =
ff_interp(ractx, block_coefs[1], 2,
105 energy <= ractx->old_energy,
107 refl_rms[2] =
ff_interp(ractx, block_coefs[2], 3, 0, energy);
Libavcodec external API header.
static av_cold int init(AVCodecContext *avctx)
audio channel layout utility functions
#define FFSWAP(type, a, b)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
bitstream reader API header.
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_CH_LAYOUT_MONO
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
@ AV_SAMPLE_FMT_S16
signed 16 bits
static const int sizes[][2]
av_cold void ff_audiodsp_init(AudioDSPContext *c)
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
unsigned int ff_rescale_rms(unsigned int rms, unsigned int energy)
void ff_eval_coefs(int *coefs, const int *refl)
Evaluate the LPC filter coefficients from the reflection coefficients.
void ff_subblock_synthesis(RA144Context *ractx, const int16_t *lpc_coefs, int cba_idx, int cb1_idx, int cb2_idx, int gval, int gain)
const int16_t ff_energy_tab[32]
void ff_int_to_int16(int16_t *out, const int *inp)
unsigned int ff_rms(const int *data)
int ff_t_sqrt(unsigned int x)
Evaluate sqrt(x << 24).
const int16_t *const ff_lpc_refl_cb[10]
int ff_interp(RA144Context *ractx, int16_t *out, int a, int copyold, int energy)
#define NBLOCKS
number of subblocks within a block
#define BLOCKSIZE
subblock size in 16-bit words
AVCodec ff_ra_144_decoder
static av_cold int ra144_decode_init(AVCodecContext *avctx)
static int ra144_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Uncompress one block (20 bytes -> 160*2 bytes).
static void do_output_subblock(RA144Context *ractx, const int16_t *lpc_coefs, int gval, GetBitContext *gb)
main external API structure.
enum AVSampleFormat sample_fmt
audio sample format
int channels
number of audio channels
uint64_t channel_layout
Audio channel layout.
const char * name
Name of the codec implementation.
This structure describes decoded (raw) audio or video 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.
This structure stores compressed data.
unsigned int lpc_tables[2][10]
unsigned int old_energy
previous frame energy
unsigned int * lpc_coef[2]
LPC coefficients: lpc_coef[0] is the coefficients of the current frame and lpc_coef[1] of the previou...
int16_t curr_sblock[50]
The current subblock padded by the last 10 values of the previous one.
unsigned int lpc_refl_rms[2]