#include <math.h>
#include "avcodec.h"
-#include "get_bits.h"
#include "libavutil/common.h"
#include "celp_math.h"
#include "celp_filters.h"
/** Maximum sharpening factor
*
* The specification says 0.8, which should be 13107, but the reference C code
- * uses 13017 instead. (Amusingly the same applies to SHARP_MAX in g729dec.c.)
+ * uses 13017 instead. (Amusingly the same applies to SHARP_MAX in bitexact G.729.)
*/
#define SHARP_MAX 0.79449462890625
#define AMR_AGC_ALPHA 0.9
typedef struct AMRContext {
+ AVFrame avframe; ///< AVFrame for decoded samples
AMRNBFrame frame; ///< decoded AMR parameters (lsf coefficients, codebook indexes, etc)
uint8_t bad_frame_indicator; ///< bad frame ? 1 : 0
enum Mode cur_frame_mode;
for (i = 0; i < 4; i++)
p->prediction_error[i] = MIN_ENERGY;
+ avcodec_get_frame_defaults(&p->avframe);
+ avctx->coded_frame = &p->avframe;
+
return 0;
}
static enum Mode unpack_bitstream(AMRContext *p, const uint8_t *buf,
int buf_size)
{
- GetBitContext gb;
enum Mode mode;
- init_get_bits(&gb, buf, buf_size * 8);
-
// Decode the first octet.
- skip_bits(&gb, 1); // padding bit
- mode = get_bits(&gb, 4); // frame type
- p->bad_frame_indicator = !get_bits1(&gb); // quality bit
- skip_bits(&gb, 2); // two padding bits
+ mode = buf[0] >> 3 & 0x0F; // frame type
+ p->bad_frame_indicator = (buf[0] & 0x4) != 0x4; // quality bit
+
+ if (mode >= N_MODES || buf_size < frame_sizes_nb[mode] + 1) {
+ return NO_DATA;
+ }
if (mode < MODE_DTX)
ff_amr_bit_reorder((uint16_t *) &p->frame, sizeof(AMRNBFrame), buf + 1,
}
-/// @defgroup amr_lpc_decoding AMR pitch LPC coefficient decoding functions
+/// @name AMR pitch LPC coefficient decoding functions
/// @{
/**
/// @}
-/// @defgroup amr_pitch_vector_decoding AMR pitch vector decoding functions
+/// @name AMR pitch vector decoding functions
/// @{
/**
/// @}
-/// @defgroup amr_algebraic_code_book AMR algebraic code book (fixed) vector decoding functions
+/// @name AMR algebraic code book (fixed) vector decoding functions
/// @{
/**
/// @}
-/// @defgroup amr_gain_decoding AMR gain decoding functions
+/// @name AMR gain decoding functions
/// @{
/**
/// @}
-/// @defgroup amr_pre_processing AMR pre-processing functions
+/// @name AMR preprocessing functions
/// @{
/**
static void apply_ir_filter(float *out, const AMRFixed *in,
const float *filter)
{
- float filter1[AMR_SUBFRAME_SIZE], //!< filters at pitch lag*1 and *2
+ float filter1[AMR_SUBFRAME_SIZE], ///< filters at pitch lag*1 and *2
filter2[AMR_SUBFRAME_SIZE];
int lag = in->pitch_lag;
float fac = in->pitch_fac;
/// @}
-/// @defgroup amr_synthesis AMR synthesis functions
+/// @name AMR synthesis functions
/// @{
/**
/// @}
-/// @defgroup amr_update AMR update functions
+/// @name AMR update functions
/// @{
/**
/// @}
-/// @defgroup amr_postproc AMR Post processing functions
+/// @name AMR Postprocessing functions
/// @{
/**
/// @}
-static int amrnb_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
- AVPacket *avpkt)
+static int amrnb_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
AMRContext *p = avctx->priv_data; // pointer to private data
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
- float *buf_out = data; // pointer to the output data buffer
- int i, subframe;
+ float *buf_out; // pointer to the output data buffer
+ int i, subframe, ret;
float fixed_gain_factor;
AMRFixed fixed_sparse = {0}; // fixed vector up to anti-sparseness processing
float spare_vector[AMR_SUBFRAME_SIZE]; // extra stack space to hold result from anti-sparseness processing
float synth_fixed_gain; // the fixed gain that synthesis should use
const float *synth_fixed_vector; // pointer to the fixed vector that synthesis should use
+ /* get output buffer */
+ p->avframe.nb_samples = AMR_BLOCK_SIZE;
+ if ((ret = avctx->get_buffer(avctx, &p->avframe)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ buf_out = (float *)p->avframe.data[0];
+
p->cur_frame_mode = unpack_bitstream(p, buf, buf_size);
+ if (p->cur_frame_mode == NO_DATA) {
+ av_log(avctx, AV_LOG_ERROR, "Corrupt bitstream\n");
+ return AVERROR_INVALIDDATA;
+ }
if (p->cur_frame_mode == MODE_DTX) {
av_log_missing_feature(avctx, "dtx mode", 1);
return -1;
pitch_sharpening(p, subframe, p->cur_frame_mode, &fixed_sparse);
+ if (fixed_sparse.pitch_lag == 0) {
+ av_log(avctx, AV_LOG_ERROR, "The file is corrupted, pitch_lag = 0 is not allowed\n");
+ return AVERROR_INVALIDDATA;
+ }
ff_set_fixed_vector(p->fixed_vector, &fixed_sparse, 1.0,
AMR_SUBFRAME_SIZE);
ff_weighted_vector_sumf(p->lsf_avg, p->lsf_avg, p->lsf_q[3],
0.84, 0.16, LP_FILTER_ORDER);
- /* report how many samples we got */
- *data_size = AMR_BLOCK_SIZE * sizeof(float);
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = p->avframe;
/* return the amount of bytes consumed if everything was OK */
return frame_sizes_nb[p->cur_frame_mode] + 1; // +7 for rounding and +8 for TOC
.priv_data_size = sizeof(AMRContext),
.init = amrnb_decode_init,
.decode = amrnb_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Adaptive Multi-Rate NarrowBand"),
- .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_FLT,AV_SAMPLE_FMT_NONE},
+ .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLT,
+ AV_SAMPLE_FMT_NONE },
};
projects / ffmpeg / blobdiff