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avcodec/amr*dec: add multichannel support

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This commit is contained in:
Paul B Mahol 2021-09-30 14:18:22 +02:00
parent e26c4d252f
commit f282c34c00
4 changed files with 154 additions and 73 deletions
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30
libavcodec/amr_parser.c
View File

@ -39,9 +39,17 @@ typedef struct AMRParseContext {
ParseContext pc;
uint64_t cumulated_size;
uint64_t block_count;
int current_channel;
int remaining;
} AMRParseContext;
static av_cold int amr_parse_init(AVCodecParserContext *s1)
{
AMRParseContext *s = s1->priv_data;
s->remaining = -1;
return 0;
}
static int amr_parse(AVCodecParserContext *s1,
AVCodecContext *avctx,
const uint8_t **poutbuf, int *poutbuf_size,
@ -57,10 +65,13 @@ static int amr_parse(AVCodecParserContext *s1,
if (s1->flags & PARSER_FLAG_COMPLETE_FRAMES) {
next = buf_size;
} else {
if (s->remaining) {
int ch, offset = 0;
for (ch = s->current_channel; ch < avctx->channels; ch++) {
if (s->remaining >= 0) {
next = s->remaining;
} else {
int mode = (buf[0] >> 3) & 0x0F;
int mode = (buf[offset] >> 3) & 0x0F;
if (avctx->codec_id == AV_CODEC_ID_AMR_NB) {
next = amrnb_packed_size[mode];
@ -69,9 +80,19 @@ static int amr_parse(AVCodecParserContext *s1,
}
}
s->remaining = next - FFMIN(buf_size, next);
if (s->remaining)
offset += next;
if (offset >= buf_size) {
s->remaining = offset - buf_size;
next = END_NOT_FOUND;
break;
} else {
s->remaining = -1;
}
}
s->current_channel = ch % avctx->channels;
if (s->remaining < 0)
next = offset;
if (next != END_NOT_FOUND) {
if (s->cumulated_size < UINT64_MAX - next) {
@ -98,6 +119,7 @@ static int amr_parse(AVCodecParserContext *s1,
const AVCodecParser ff_amr_parser = {
.codec_ids = { AV_CODEC_ID_AMR_NB, AV_CODEC_ID_AMR_WB },
.priv_data_size = sizeof(AMRParseContext),
.parser_init = amr_parse_init,
.parser_parse = amr_parse,
.parser_close = ff_parse_close,
};

50
libavcodec/amrnbdec.c
View File

@ -145,6 +145,10 @@ typedef struct AMRContext {
} AMRContext;
typedef struct AMRChannelsContext {
AMRContext ch[2];
} AMRChannelsContext;
/** Double version of ff_weighted_vector_sumf() */
static void weighted_vector_sumd(double *out, const double *in_a,
const double *in_b, double weight_coeff_a,
@ -159,20 +163,24 @@ static void weighted_vector_sumd(double *out, const double *in_a,
static av_cold int amrnb_decode_init(AVCodecContext *avctx)
{
AMRContext *p = avctx->priv_data;
AMRChannelsContext *s = avctx->priv_data;
int i;
if (avctx->channels > 1) {
avpriv_report_missing_feature(avctx, "multi-channel AMR");
if (avctx->channels > 2) {
avpriv_report_missing_feature(avctx, ">2 channel AMR");
return AVERROR_PATCHWELCOME;
}
if (!avctx->channels) {
avctx->channels = 1;
avctx->channel_layout = AV_CH_LAYOUT_MONO;
}
if (!avctx->sample_rate)
avctx->sample_rate = 8000;
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
for (int ch = 0; ch < avctx->channels; ch++) {
AMRContext *p = &s->ch[ch];
// p->excitation always points to the same position in p->excitation_buf
p->excitation = &p->excitation_buf[PITCH_DELAY_MAX + LP_FILTER_ORDER + 1];
@ -188,6 +196,7 @@ static av_cold int amrnb_decode_init(AVCodecContext *avctx)
ff_acelp_vectors_init(&p->acelpv_ctx);
ff_celp_filter_init(&p->celpf_ctx);
ff_celp_math_init(&p->celpm_ctx);
}
return 0;
}
@ -949,25 +958,30 @@ static int amrnb_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AMRContext *p = avctx->priv_data; // pointer to private data
AMRChannelsContext *s = avctx->priv_data; // pointer to private data
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
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
int ret;
/* get output buffer */
frame->nb_samples = AMR_BLOCK_SIZE;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
buf_out = (float *)frame->data[0];
for (int ch = 0; ch < avctx->channels; ch++) {
AMRContext *p = &s->ch[ch];
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
float *buf_out = (float *)frame->extended_data[ch];
int channel_size;
int i, subframe;
p->cur_frame_mode = unpack_bitstream(p, buf, buf_size);
channel_size = frame_sizes_nb[p->cur_frame_mode] + 1; // +7 for rounding and +8 for TOC
if (p->cur_frame_mode == NO_DATA) {
av_log(avctx, AV_LOG_ERROR, "Corrupt bitstream\n");
return AVERROR_INVALIDDATA;
@ -1072,11 +1086,13 @@ static int amrnb_decode_frame(AVCodecContext *avctx, void *data,
* qbar(n-1) rather than qbar(n) in section 6.1(4) equation 71. */
p->acelpv_ctx.weighted_vector_sumf(p->lsf_avg, p->lsf_avg, p->lsf_q[3],
0.84, 0.16, LP_FILTER_ORDER);
buf += channel_size;
buf_size -= channel_size;
}
*got_frame_ptr = 1;
/* 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
return avpkt->size;
}
@ -1085,10 +1101,10 @@ const AVCodec ff_amrnb_decoder = {
.long_name = NULL_IF_CONFIG_SMALL("AMR-NB (Adaptive Multi-Rate NarrowBand)"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_AMR_NB,
.priv_data_size = sizeof(AMRContext),
.priv_data_size = sizeof(AMRChannelsContext),
.init = amrnb_decode_init,
.decode = amrnb_decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLT,
.sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_NONE },
};

55
libavcodec/amrwbdec.c
View File

@ -93,21 +93,30 @@ typedef struct AMRWBContext {
} AMRWBContext;
typedef struct AMRWBChannelsContext {
AMRWBContext ch[2];
} AMRWBChannelsContext;
static av_cold int amrwb_decode_init(AVCodecContext *avctx)
{
AMRWBContext *ctx = avctx->priv_data;
AMRWBChannelsContext *s = avctx->priv_data;
int i;
if (avctx->channels > 1) {
avpriv_report_missing_feature(avctx, "multi-channel AMR");
if (avctx->channels > 2) {
avpriv_report_missing_feature(avctx, ">2 channel AMR");
return AVERROR_PATCHWELCOME;
}
if (!avctx->channels) {
avctx->channels = 1;
avctx->channel_layout = AV_CH_LAYOUT_MONO;
}
if (!avctx->sample_rate)
avctx->sample_rate = 16000;
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
for (int ch = 0; ch < avctx->channels; ch++) {
AMRWBContext *ctx = &s->ch[ch];
av_lfg_init(&ctx->prng, 1);
@ -124,6 +133,7 @@ static av_cold int amrwb_decode_init(AVCodecContext *avctx)
ff_acelp_vectors_init(&ctx->acelpv_ctx);
ff_celp_filter_init(&ctx->celpf_ctx);
ff_celp_math_init(&ctx->celpm_ctx);
}
return 0;
}
@ -1094,13 +1104,21 @@ static void update_sub_state(AMRWBContext *ctx)
static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame_ptr, AVPacket *avpkt)
{
AMRWBContext *ctx = avctx->priv_data;
AMRWBChannelsContext *s = avctx->priv_data;
AVFrame *frame = data;
AMRWBFrame *cf = &ctx->frame;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
int sub, i, ret;
/* get output buffer */
frame->nb_samples = 4 * AMRWB_SFR_SIZE_16k;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
for (int ch = 0; ch < avctx->channels; ch++) {
AMRWBContext *ctx = &s->ch[ch];
AMRWBFrame *cf = &ctx->frame;
int expected_fr_size, header_size;
float *buf_out;
float spare_vector[AMRWB_SFR_SIZE]; // extra stack space to hold result from anti-sparseness processing
float fixed_gain_factor; // fixed gain correction factor (gamma)
float *synth_fixed_vector; // pointer to the fixed vector that synthesis should use
@ -1110,13 +1128,7 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
float hb_exc[AMRWB_SFR_SIZE_16k]; // excitation for the high frequency band
float hb_samples[AMRWB_SFR_SIZE_16k]; // filtered high-band samples from synthesis
float hb_gain;
int sub, i, ret;
/* get output buffer */
frame->nb_samples = 4 * AMRWB_SFR_SIZE_16k;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
buf_out = (float *)frame->data[0];
float *buf_out = (float *)frame->extended_data[ch];
header_size = decode_mime_header(ctx, buf);
expected_fr_size = ((cf_sizes_wb[ctx->fr_cur_mode] + 7) >> 3) + 1;
@ -1127,9 +1139,10 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
if (ctx->fr_cur_mode == NO_DATA || !ctx->fr_quality) {
/* The specification suggests a "random signal" and
"a muting technique" to "gradually decrease the output level". */
av_samples_set_silence(&frame->data[0], 0, frame->nb_samples, 1, AV_SAMPLE_FMT_FLT);
*got_frame_ptr = 1;
return expected_fr_size;
av_samples_set_silence(&frame->extended_data[ch], 0, frame->nb_samples, 1, AV_SAMPLE_FMT_FLT);
buf += expected_fr_size;
buf_size -= expected_fr_size;
continue;
}
if (ctx->fr_cur_mode > MODE_SID) {
av_log(avctx, AV_LOG_ERROR,
@ -1270,9 +1283,13 @@ static int amrwb_decode_frame(AVCodecContext *avctx, void *data,
memcpy(ctx->isp_sub4_past, ctx->isp[3], LP_ORDER * sizeof(ctx->isp[3][0]));
memcpy(ctx->isf_past_final, ctx->isf_cur, LP_ORDER * sizeof(float));
buf += expected_fr_size;
buf_size -= expected_fr_size;
}
*got_frame_ptr = 1;
return expected_fr_size;
return avpkt->size;
}
const AVCodec ff_amrwb_decoder = {
@ -1280,7 +1297,7 @@ const AVCodec ff_amrwb_decoder = {
.long_name = NULL_IF_CONFIG_SMALL("AMR-WB (Adaptive Multi-Rate WideBand)"),
.type = AVMEDIA_TYPE_AUDIO,
.id = AV_CODEC_ID_AMR_WB,
.priv_data_size = sizeof(AMRWBContext),
.priv_data_size = sizeof(AMRWBChannelsContext),
.init = amrwb_decode_init,
.decode = amrwb_decode_frame,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,

68
libavformat/amr.c
View File

@ -21,13 +21,12 @@
/*
Write and read amr data according to RFC3267, http://www.ietf.org/rfc/rfc3267.txt?number=3267
Only mono files are supported.
*/
#include "libavutil/channel_layout.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "rawdec.h"
#include "rawenc.h"
@ -36,8 +35,10 @@ typedef struct AMRContext {
FFRawDemuxerContext rawctx;
} AMRContext;
static const char AMR_header[] = "#!AMR\n";
static const char AMRWB_header[] = "#!AMR-WB\n";
static const uint8_t AMR_header[6] = "#!AMR\x0a";
static const uint8_t AMRMC_header[12] = "#!AMR_MC1.0\x0a";
static const uint8_t AMRWB_header[9] = "#!AMR-WB\x0a";
static const uint8_t AMRWBMC_header[15] = "#!AMR-WB_MC1.0\x0a";
static const uint8_t amrnb_packed_size[16] = {
13, 14, 16, 18, 20, 21, 27, 32, 6, 1, 1, 1, 1, 1, 1, 1
@ -69,7 +70,7 @@ static int amr_probe(const AVProbeData *p)
{
// Only check for "#!AMR" which could be amr-wb, amr-nb.
// This will also trigger multichannel files: "#!AMR_MC1.0\n" and
// "#!AMR-WB_MC1.0\n" (not supported)
// "#!AMR-WB_MC1.0\n"
if (!memcmp(p->buf, AMR_header, 5))
return AVPROBE_SCORE_MAX;
@ -82,35 +83,60 @@ static int amr_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVStream *st;
uint8_t header[9];
uint8_t header[19] = { 0 };
int read, back = 0, ret;
if (avio_read(pb, header, 6) != 6)
return AVERROR_INVALIDDATA;
ret = ffio_ensure_seekback(s->pb, sizeof(header));
if (ret < 0)
return ret;
read = avio_read(pb, header, sizeof(header));
if (read < 0)
return ret;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
if (memcmp(header, AMR_header, 6)) {
if (avio_read(pb, header + 6, 3) != 3)
return AVERROR_INVALIDDATA;
if (memcmp(header, AMRWB_header, 9)) {
return -1;
}
st->codecpar->codec_tag = MKTAG('s', 'a', 'w', 'b');
st->codecpar->codec_id = AV_CODEC_ID_AMR_WB;
st->codecpar->sample_rate = 16000;
} else {
if (!memcmp(header, AMR_header, sizeof(AMR_header))) {
st->codecpar->codec_tag = MKTAG('s', 'a', 'm', 'r');
st->codecpar->codec_id = AV_CODEC_ID_AMR_NB;
st->codecpar->sample_rate = 8000;
}
st->codecpar->channels = 1;
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
back = read - sizeof(AMR_header);
} else if (!memcmp(header, AMRWB_header, sizeof(AMRWB_header))) {
st->codecpar->codec_tag = MKTAG('s', 'a', 'w', 'b');
st->codecpar->codec_id = AV_CODEC_ID_AMR_WB;
st->codecpar->sample_rate = 16000;
st->codecpar->channels = 1;
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
back = read - sizeof(AMRWB_header);
} else if (!memcmp(header, AMRMC_header, sizeof(AMRMC_header))) {
st->codecpar->codec_tag = MKTAG('s', 'a', 'm', 'r');
st->codecpar->codec_id = AV_CODEC_ID_AMR_NB;
st->codecpar->sample_rate = 8000;
st->codecpar->channels = AV_RL32(header + 12);
back = read - 4 - sizeof(AMRMC_header);
} else if (!memcmp(header, AMRWBMC_header, sizeof(AMRWBMC_header))) {
st->codecpar->codec_tag = MKTAG('s', 'a', 'w', 'b');
st->codecpar->codec_id = AV_CODEC_ID_AMR_WB;
st->codecpar->sample_rate = 16000;
st->codecpar->channels = AV_RL32(header + 15);
back = read - 4 - sizeof(AMRWBMC_header);
} else {
return AVERROR_INVALIDDATA;
}
if (st->codecpar->channels < 1)
return AVERROR_INVALIDDATA;
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
if (back > 0)
avio_seek(pb, -back, SEEK_CUR);
return 0;
}