86 memset(
ctx->channel_blocks, 0,
sizeof(
ctx->channel_blocks));
93 ctx->num_channel_blocks = 1;
98 ctx->num_channel_blocks = 1;
103 ctx->num_channel_blocks = 2;
109 ctx->num_channel_blocks = 3;
116 ctx->num_channel_blocks = 4;
124 ctx->num_channel_blocks = 5;
133 ctx->num_channel_blocks = 5;
142 "Unsupported channel count: %d!\n", avctx->
channels);
181 if (!
ctx->ch_units || !
ctx->fdsp) {
185 for (
i = 0;
i <
ctx->num_channel_blocks;
i++) {
186 for (ch = 0; ch < 2; ch++) {
187 ctx->ch_units[
i].channels[ch].ch_num = ch;
188 ctx->ch_units[
i].channels[ch].wnd_shape = &
ctx->ch_units[
i].channels[ch].wnd_shape_hist[0][0];
189 ctx->ch_units[
i].channels[ch].wnd_shape_prev = &
ctx->ch_units[
i].channels[ch].wnd_shape_hist[1][0];
190 ctx->ch_units[
i].channels[ch].gain_data = &
ctx->ch_units[
i].channels[ch].gain_data_hist[0][0];
191 ctx->ch_units[
i].channels[ch].gain_data_prev = &
ctx->ch_units[
i].channels[ch].gain_data_hist[1][0];
192 ctx->ch_units[
i].channels[ch].tones_info = &
ctx->ch_units[
i].channels[ch].tones_info_hist[0][0];
193 ctx->ch_units[
i].channels[ch].tones_info_prev = &
ctx->ch_units[
i].channels[ch].tones_info_hist[1][0];
196 ctx->ch_units[
i].waves_info = &
ctx->ch_units[
i].wave_synth_hist[0];
197 ctx->ch_units[
i].waves_info_prev = &
ctx->ch_units[
i].wave_synth_hist[1];
212 int i, sb, ch,
qu, nspeclines, RNG_index;
219 for (ch = 0; ch < num_channels; ch++)
229 sb_RNG_index[sb] = RNG_index & 0x3FC;
232 for (ch = 0; ch < num_channels; ch++) {
245 for (
i = 0;
i < nspeclines;
i++)
252 sb_RNG_index[sb], sb);
276 for (ch = 0; ch < num_channels; ch++) {
314 &
ctx->time_buf[ch][sb * 128]);
320 &
ctx->time_buf[ch][0], &
ctx->outp_buf[ch][0]);
324 for (ch = 0; ch < num_channels; ch++) {
337 int *got_frame_ptr,
AVPacket *avpkt)
341 int i, ret, ch_unit_id, ch_block = 0, out_ch_index = 0, channels_to_process;
362 if (ch_block >=
ctx->num_channel_blocks ||
363 ctx->channel_blocks[ch_block] != ch_unit_id) {
365 "Frame data doesn't match channel configuration!\n");
369 ctx->ch_units[ch_block].unit_type = ch_unit_id;
370 channels_to_process = ch_unit_id + 1;
373 &
ctx->ch_units[ch_block],
379 channels_to_process, avctx);
381 channels_to_process, avctx);
383 for (
i = 0;
i < channels_to_process;
i++)
384 memcpy(samples_p[out_ch_index +
i],
ctx->outp_buf[
i],
388 out_ch_index += channels_to_process;
397 .
name =
"atrac3plus",
410 .
name =
"atrac3plusal",
411 .long_name =
NULL_IF_CONFIG_SMALL(
"ATRAC3+ AL (Adaptive TRansform Acoustic Coding 3+ Advanced Lossless)"),
av_cold void ff_atrac3p_init_vlcs(void)
Initialize VLC tables for bitstream parsing.
int ff_atrac3p_decode_channel_unit(GetBitContext *gb, Atrac3pChanUnitCtx *ctx, int num_channels, AVCodecContext *avctx)
Decode bitstream data of a channel unit.
Global structures, constants and data for ATRAC3+ decoder.
void ff_atrac3p_init_dsp_static(void)
Initialize sine waves synthesizer and ff_sine_* tables.
const uint16_t ff_atrac3p_qu_to_spec_pos[33]
Map quant unit number to its position in the spectrum.
#define ATRAC3P_FRAME_SAMPLES
void ff_atrac3p_init_imdct(AVCodecContext *avctx, FFTContext *mdct_ctx)
Initialize IMDCT transform.
#define ATRAC3P_SUBBAND_SAMPLES
number of samples per subband
const float ff_atrac3p_mant_tab[8]
void ff_atrac3p_imdct(AVFloatDSPContext *fdsp, FFTContext *mdct_ctx, float *pIn, float *pOut, int wind_id, int sb)
Regular IMDCT and windowing without overlapping, with spectrum reversal in the odd subbands.
const float ff_atrac3p_sf_tab[64]
void ff_atrac3p_generate_tones(Atrac3pChanUnitCtx *ch_unit, AVFloatDSPContext *fdsp, int ch_num, int sb, float *out)
Synthesize sine waves for a particular subband.
#define ATRAC3P_SUBBANDS
Global unit sizes.
@ CH_UNIT_TERMINATOR
unit sequence terminator
@ CH_UNIT_EXTENSION
unit containing extension information
@ CH_UNIT_STEREO
unit containing two jointly-coded channels
@ CH_UNIT_MONO
unit containing one coded channel
void ff_atrac3p_power_compensation(Atrac3pChanUnitCtx *ctx, AVFloatDSPContext *fdsp, int ch_index, float *sp, int rng_index, int sb_num)
Perform power compensation aka noise dithering.
void ff_atrac3p_ipqf(FFTContext *dct_ctx, Atrac3pIPQFChannelCtx *hist, const float *in, float *out)
Subband synthesis filter based on the polyphase quadrature (pseudo-QMF) filter bank.
static av_cold int atrac3p_decode_close(AVCodecContext *avctx)
static int atrac3p_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
AVCodec ff_atrac3p_decoder
static av_cold int set_channel_params(ATRAC3PContext *ctx, AVCodecContext *avctx)
static void decode_residual_spectrum(ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit, float out[2][ATRAC3P_FRAME_SAMPLES], int num_channels, AVCodecContext *avctx)
static void reconstruct_frame(ATRAC3PContext *ctx, Atrac3pChanUnitCtx *ch_unit, int num_channels, AVCodecContext *avctx)
static av_cold void atrac3p_init_static(void)
static av_cold int atrac3p_decode_init(AVCodecContext *avctx)
AVCodec ff_atrac3pal_decoder
void ff_atrac_gain_compensation(AtracGCContext *gctx, float *in, float *prev, AtracGainInfo *gc_now, AtracGainInfo *gc_next, int num_samples, float *out)
Apply gain compensation and perform the MDCT overlapping part.
av_cold void ff_atrac_init_gain_compensation(AtracGCContext *gctx, int id2exp_offset, int loc_scale)
Initialize gain compensation context.
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 get_bits_left(GetBitContext *gb)
static unsigned int get_bits1(GetBitContext *s)
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_4POINT0
#define AV_CH_LAYOUT_7POINT1
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_SURROUND
#define AV_CH_LAYOUT_6POINT1_BACK
#define AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_5POINT1_BACK
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
@ AV_SAMPLE_FMT_FLTP
float, planar
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static int ff_thread_once(char *control, void(*routine)(void))
float outp_buf[2][ATRAC3P_FRAME_SAMPLES]
Atrac3pChanUnitCtx * ch_units
global channel units
uint64_t my_channel_layout
current channel layout
float time_buf[2][ATRAC3P_FRAME_SAMPLES]
output of the gain compensation
int num_channel_blocks
number of channel blocks
AtracGCContext gainc_ctx
gain compensation context
float mdct_buf[2][ATRAC3P_FRAME_SAMPLES]
output of the IMDCT
float samples[2][ATRAC3P_FRAME_SAMPLES]
quantized MDCT spectrum
FFTContext ipqf_dct_ctx
IDCT context used by IPQF.
uint8_t channel_blocks[5]
channel configuration descriptor
main external API structure.
enum AVSampleFormat sample_fmt
audio sample format
int flags
AV_CODEC_FLAG_*.
int channels
number of audio channels
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
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 ** extended_data
pointers to the data planes/channels.
This structure stores compressed data.
int qu_sf_idx[32]
array of scale factor indexes for each quant unit
int qu_wordlen[32]
array of word lengths for each quant unit
uint8_t * wnd_shape
IMDCT window shape for current frame.
AtracGainInfo * gain_data_prev
gain control data for previous frame
int16_t spectrum[2048]
decoded IMDCT spectrum
uint8_t * wnd_shape_prev
IMDCT window shape for previous frame.
AtracGainInfo * gain_data
gain control data for next frame
Atrac3pWavesData * tones_info
Atrac3pWavesData * tones_info_prev
Atrac3pWaveSynthParams * waves_info
float prev_buf[2][ATRAC3P_FRAME_SAMPLES]
overlapping buffer
uint8_t swap_channels[ATRAC3P_SUBBANDS]
1 - perform subband-wise channel swapping
uint8_t negate_coeffs[ATRAC3P_SUBBANDS]
1 - subband-wise IMDCT coefficients negation
int used_quant_units
number of quant units with coded spectrum
Atrac3pChanParams channels[2]
Atrac3pIPQFChannelCtx ipqf_ctx[2]
Atrac3pWaveSynthParams * waves_info_prev
int num_coded_subbands
number of subbands with coded spectrum
int unit_type
unit type (mono/stereo)
int tones_present
1 - tones info present
Parameters of a group of sine waves.
int num_wavs
number of sine waves in the group
Gain compensation context structure.
Gain control parameters for one subband.