static av_cold int amrwb_decode_init(AVCodecContext *avctx)
{
AMRWBContext *ctx = avctx->priv_data;
int i;
if (avctx->channels > 1) {
av_log_missing_feature(avctx, "multi-channel AMR", 0);
return AVERROR_PATCHWELCOME;
}
avctx->channels = 1;
avctx->channel_layout = AV_CH_LAYOUT_MONO;
avctx->sample_rate = 16000;
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
av_lfg_init(&ctx->prng, 1);
ctx->excitation = &ctx->excitation_buf[AMRWB_P_DELAY_MAX + LP_ORDER + 1];
ctx->first_frame = 1;
for (i = 0; i < LP_ORDER; i++)
ctx->isf_past_final[i] = isf_init[i] * (1.0f / (1 << 15));
for (i = 0; i < 4; i++)
ctx->prediction_error[i] = MIN_ENERGY;
avcodec_get_frame_defaults(&ctx->avframe);
avctx->coded_frame = &ctx->avframe;
return 0;
}
static av_cold int amrnb_decode_init(AVCodecContext *avctx)
{
AMRContext *p = avctx->priv_data;
int i;
if (avctx->channels > 1) {
av_log_missing_feature(avctx, "multi-channel AMR", 0);
return AVERROR_PATCHWELCOME;
}
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;
// p->excitation always points to the same position in p->excitation_buf
p->excitation = &p->excitation_buf[PITCH_DELAY_MAX + LP_FILTER_ORDER + 1];
for (i = 0; i < LP_FILTER_ORDER; i++) {
p->prev_lsp_sub4[i] = lsp_sub4_init[i] * 1000 / (float)(1 << 15);
p->lsf_avg[i] = p->lsf_q[3][i] = lsp_avg_init[i] / (float)(1 << 15);
}
for (i = 0; i < 4; i++)
p->prediction_error[i] = MIN_ENERGY;
ff_acelp_filter_init(&p->acelpf_ctx);
ff_acelp_vectors_init(&p->acelpv_ctx);
ff_celp_filter_init(&p->celpf_ctx);
ff_celp_math_init(&p->celpm_ctx);
return 0;
}
static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
{
uint32_t magic = AV_RL32(buf);
switch (magic) {
case TM2_OLD_HEADER_MAGIC:
av_log_missing_feature(ctx->avctx, "TM2 old header", 1);
return 0;
case TM2_NEW_HEADER_MAGIC:
return 0;
default:
av_log(ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
return AVERROR_INVALIDDATA;
}
}
static int amr_decode_fix_avctx(AVCodecContext *avctx)
{
const int is_amr_wb = 1 + (avctx->codec_id == AV_CODEC_ID_AMR_WB);
avctx->sample_rate = 8000 * is_amr_wb;
if (avctx->channels > 1) {
av_log_missing_feature(avctx, "multi-channel AMR", 0);
return AVERROR_PATCHWELCOME;
}
avctx->channels = 1;
avctx->channel_layout = AV_CH_LAYOUT_MONO;
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
return 0;
}
static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size)
{
VP56RangeCoder *c = &s->c;
int parse_filter_info = 0;
int coeff_offset = 0;
int vrt_shift = 0;
int sub_version;
int rows, cols;
int res = 0;
int separated_coeff = buf[0] & 1;
s->framep[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80);
ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);
if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
sub_version = buf[1] >> 3;
if (sub_version > 8)
return AVERROR_INVALIDDATA;
s->filter_header = buf[1] & 0x06;
if (buf[1] & 1) {
av_log_missing_feature(s->avctx, "Interlacing", 0);
return AVERROR_PATCHWELCOME;
}
if (separated_coeff || !s->filter_header) {
coeff_offset = AV_RB16(buf+2) - 2;
buf += 2;
buf_size -= 2;
}
rows = buf[2]; /* number of stored macroblock rows */
cols = buf[3]; /* number of stored macroblock cols */
/* buf[4] is number of displayed macroblock rows */
/* buf[5] is number of displayed macroblock cols */
if (!rows || !cols) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid size %dx%d\n", cols << 4, rows << 4);
return AVERROR_INVALIDDATA;
}
if (!s->macroblocks || /* first frame */
16*cols != s->avctx->coded_width ||
16*rows != s->avctx->coded_height) {
avcodec_set_dimensions(s->avctx, 16*cols, 16*rows);
if (s->avctx->extradata_size == 1) {
s->avctx->width -= s->avctx->extradata[0] >> 4;
s->avctx->height -= s->avctx->extradata[0] & 0x0F;
}
static inline int tm2_read_header(TM2Context *ctx, const uint8_t *buf)
{
uint32_t magic;
magic = AV_RL32(buf);
buf += 4;
if(magic == 0x00000100) { /* old header */
av_log_missing_feature(ctx->avctx, "TM2 old header", 1);
return 40;
} else if(magic == 0x00000101) { /* new header */
return 40;
} else {
av_log (ctx->avctx, AV_LOG_ERROR, "Not a TM2 header: 0x%08X\n", magic);
return -1;
}
}
static int parse_fmtp(AVStream *stream, PayloadContext *data,
char *attr, char *value)
{
int res;
if (!strcmp(attr, "config")) {
res = parse_fmtp_config(stream, value);
if (res < 0)
return res;
} else if (!strcmp(attr, "cpresent")) {
int cpresent = atoi(value);
if (cpresent != 0)
av_log_missing_feature(NULL, "RTP MP4A-LATM with in-band "
"configuration", 1);
}
return 0;
}
static inline int decode_subframe(FLACContext *s, int channel)
{
int32_t *decoded = s->decoded[channel];
int type, wasted = 0;
int bps = s->bps;
int i, tmp;
if (channel == 0) {
if (s->ch_mode == FLAC_CHMODE_RIGHT_SIDE)
bps++;
} else {
if (s->ch_mode == FLAC_CHMODE_LEFT_SIDE || s->ch_mode == FLAC_CHMODE_MID_SIDE)
bps++;
}
if (get_bits1(&s->gb)) {
av_log(s->avctx, AV_LOG_ERROR, "invalid subframe padding\n");
return -1;
}
type = get_bits(&s->gb, 6);
if (get_bits1(&s->gb)) {
int left = get_bits_left(&s->gb);
wasted = 1;
if ( left < 0 ||
(left < bps && !show_bits_long(&s->gb, left)) ||
!show_bits_long(&s->gb, bps)) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid number of wasted bits > available bits (%d) - left=%d\n",
bps, left);
return AVERROR_INVALIDDATA;
}
while (!get_bits1(&s->gb))
wasted++;
bps -= wasted;
}
if (bps > 32) {
av_log_missing_feature(s->avctx, "Decorrelated bit depth > 32", 0);
return AVERROR_PATCHWELCOME;
}
//FIXME use av_log2 for types
if (type == 0) {
tmp = get_sbits_long(&s->gb, bps);
for (i = 0; i < s->blocksize; i++)
decoded[i] = tmp;
} else if (type == 1) {
for (i = 0; i < s->blocksize; i++)
decoded[i] = get_sbits_long(&s->gb, bps);
} else if ((type >= 8) && (type <= 12)) {
if (decode_subframe_fixed(s, decoded, type & ~0x8, bps) < 0)
return -1;
} else if (type >= 32) {
if (decode_subframe_lpc(s, decoded, (type & ~0x20)+1, bps) < 0)
return -1;
} else {
av_log(s->avctx, AV_LOG_ERROR, "invalid coding type\n");
return -1;
}
if (wasted) {
int i;
for (i = 0; i < s->blocksize; i++)
decoded[i] <<= wasted;
}
return 0;
}
static int spdif_get_offset_and_codec(AVFormatContext *s,
enum IEC61937DataType data_type,
const char *buf, int *offset,
enum CodecID *codec)
{
AACADTSHeaderInfo aac_hdr;
GetBitContext gbc;
switch (data_type & 0xff) {
case IEC61937_AC3:
*offset = AC3_FRAME_SIZE << 2;
*codec = CODEC_ID_AC3;
break;
case IEC61937_MPEG1_LAYER1:
*offset = spdif_mpeg_pkt_offset[1][0];
*codec = CODEC_ID_MP1;
break;
case IEC61937_MPEG1_LAYER23:
*offset = spdif_mpeg_pkt_offset[1][0];
*codec = CODEC_ID_MP3;
break;
case IEC61937_MPEG2_EXT:
*offset = 4608;
*codec = CODEC_ID_MP3;
break;
case IEC61937_MPEG2_AAC:
init_get_bits(&gbc, buf, AAC_ADTS_HEADER_SIZE * 8);
if (ff_aac_parse_header(&gbc, &aac_hdr)) {
if (s) /* be silent during a probe */
av_log(s, AV_LOG_ERROR, "Invalid AAC packet in IEC 61937\n");
return AVERROR_INVALIDDATA;
}
*offset = aac_hdr.samples << 2;
*codec = CODEC_ID_AAC;
break;
case IEC61937_MPEG2_LAYER1_LSF:
*offset = spdif_mpeg_pkt_offset[0][0];
*codec = CODEC_ID_MP1;
break;
case IEC61937_MPEG2_LAYER2_LSF:
*offset = spdif_mpeg_pkt_offset[0][1];
*codec = CODEC_ID_MP2;
break;
case IEC61937_MPEG2_LAYER3_LSF:
*offset = spdif_mpeg_pkt_offset[0][2];
*codec = CODEC_ID_MP3;
break;
case IEC61937_DTS1:
*offset = 2048;
*codec = CODEC_ID_DTS;
break;
case IEC61937_DTS2:
*offset = 4096;
*codec = CODEC_ID_DTS;
break;
case IEC61937_DTS3:
*offset = 8192;
*codec = CODEC_ID_DTS;
break;
default:
if (s) { /* be silent during a probe */
av_log(s, AV_LOG_WARNING, "Data type 0x%04x", data_type);
av_log_missing_feature(s, " in IEC 61937 is", 1);
}
return AVERROR_PATCHWELCOME;
}
return 0;
}
static int spdif_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
enum IEC61937DataType data_type;
enum CodecID codec_id;
uint32_t state = 0;
int pkt_size_bits, offset, ret;
while (state != (AV_BSWAP16C(SYNCWORD1) << 16 | AV_BSWAP16C(SYNCWORD2))) {
state = (state << 8) | avio_r8(pb);
if (url_feof(pb))
return AVERROR_EOF;
}
data_type = avio_rl16(pb);
pkt_size_bits = avio_rl16(pb);
if (pkt_size_bits % 16)
av_log_ask_for_sample(s, "Packet does not end to a 16-bit boundary.");
ret = av_new_packet(pkt, FFALIGN(pkt_size_bits, 16) >> 3);
if (ret)
return ret;
pkt->pos = avio_tell(pb) - BURST_HEADER_SIZE;
if (avio_read(pb, pkt->data, pkt->size) < pkt->size) {
av_free_packet(pkt);
return AVERROR_EOF;
}
ff_spdif_bswap_buf16((uint16_t *)pkt->data, (uint16_t *)pkt->data, pkt->size >> 1);
ret = spdif_get_offset_and_codec(s, data_type, pkt->data,
&offset, &codec_id);
if (ret) {
av_free_packet(pkt);
return ret;
}
/* skip over the padding to the beginning of the next frame */
avio_skip(pb, offset - pkt->size - BURST_HEADER_SIZE);
if (!s->nb_streams) {
/* first packet, create a stream */
AVStream *st = av_new_stream(s, 0);
if (!st) {
av_free_packet(pkt);
return AVERROR(ENOMEM);
}
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = codec_id;
} else if (codec_id != s->streams[0]->codec->codec_id) {
av_log_missing_feature(s, "codec change in IEC 61937", 0);
return AVERROR_PATCHWELCOME;
}
if (!s->bit_rate && s->streams[0]->codec->sample_rate)
/* stream bitrate matches 16-bit stereo PCM bitrate for currently
supported codecs */
s->bit_rate = 2 * 16 * s->streams[0]->codec->sample_rate;
return 0;
}
static av_cold int rv10_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
static int done=0;
int major_ver, minor_ver, micro_ver;
if (avctx->extradata_size < 8) {
av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
return -1;
}
MPV_decode_defaults(s);
s->avctx= avctx;
s->out_format = FMT_H263;
s->codec_id= avctx->codec_id;
s->orig_width = s->width = avctx->coded_width;
s->orig_height= s->height = avctx->coded_height;
s->h263_long_vectors= ((uint8_t*)avctx->extradata)[3] & 1;
avctx->sub_id= AV_RB32((uint8_t*)avctx->extradata + 4);
major_ver = RV_GET_MAJOR_VER(avctx->sub_id);
minor_ver = RV_GET_MINOR_VER(avctx->sub_id);
micro_ver = RV_GET_MICRO_VER(avctx->sub_id);
s->low_delay = 1;
switch (major_ver) {
case 1:
s->rv10_version = micro_ver ? 3 : 1;
s->obmc = micro_ver == 2;
break;
case 2:
if (minor_ver >= 2) {
s->low_delay = 0;
s->avctx->has_b_frames = 1;
}
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", avctx->sub_id);
av_log_missing_feature(avctx, "RV1/2 version", 1);
return AVERROR_PATCHWELCOME;
}
if(avctx->debug & FF_DEBUG_PICT_INFO) {
av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", avctx->sub_id, avctx->extradata_size >= 4 ? ((uint32_t*)avctx->extradata)[0] : -1);
}
avctx->pix_fmt = PIX_FMT_YUV420P;
if (MPV_common_init(s) < 0)
return -1;
h263_decode_init_vlc(s);
/* init rv vlc */
if (!done) {
INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256,
rv_lum_bits, 1, 1,
rv_lum_code, 2, 2, 16384);
INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256,
rv_chrom_bits, 1, 1,
rv_chrom_code, 2, 2, 16388);
done = 1;
}
return 0;
}
static av_cold int mpc8_decode_init(AVCodecContext * avctx)
{
int i;
MPCContext *c = avctx->priv_data;
GetBitContext gb;
static int vlc_initialized = 0;
int channels;
static VLC_TYPE band_table[542][2];
static VLC_TYPE q1_table[520][2];
static VLC_TYPE q9up_table[524][2];
static VLC_TYPE scfi0_table[1 << MPC8_SCFI0_BITS][2];
static VLC_TYPE scfi1_table[1 << MPC8_SCFI1_BITS][2];
static VLC_TYPE dscf0_table[560][2];
static VLC_TYPE dscf1_table[598][2];
static VLC_TYPE q3_0_table[512][2];
static VLC_TYPE q3_1_table[516][2];
static VLC_TYPE codes_table[5708][2];
if(avctx->extradata_size < 2){
av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
return -1;
}
memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
av_lfg_init(&c->rnd, 0xDEADBEEF);
ff_dsputil_init(&c->dsp, avctx);
ff_mpadsp_init(&c->mpadsp);
ff_mpc_init();
init_get_bits(&gb, avctx->extradata, 16);
skip_bits(&gb, 3);//sample rate
c->maxbands = get_bits(&gb, 5) + 1;
if (c->maxbands >= BANDS) {
av_log(avctx,AV_LOG_ERROR, "maxbands %d too high\n", c->maxbands);
return AVERROR_INVALIDDATA;
}
channels = get_bits(&gb, 4) + 1;
if (channels > 2) {
av_log_missing_feature(avctx, "Multichannel MPC SV8", 1);
return -1;
}
c->MSS = get_bits1(&gb);
c->frames = 1 << (get_bits(&gb, 3) * 2);
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
avctx->channel_layout = (channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO;
avctx->channels = channels;
avcodec_get_frame_defaults(&c->frame);
avctx->coded_frame = &c->frame;
if(vlc_initialized) return 0;
av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
band_vlc.table = band_table;
band_vlc.table_allocated = 542;
init_vlc(&band_vlc, MPC8_BANDS_BITS, MPC8_BANDS_SIZE,
mpc8_bands_bits, 1, 1,
mpc8_bands_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
q1_vlc.table = q1_table;
q1_vlc.table_allocated = 520;
init_vlc(&q1_vlc, MPC8_Q1_BITS, MPC8_Q1_SIZE,
mpc8_q1_bits, 1, 1,
mpc8_q1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
q9up_vlc.table = q9up_table;
q9up_vlc.table_allocated = 524;
init_vlc(&q9up_vlc, MPC8_Q9UP_BITS, MPC8_Q9UP_SIZE,
mpc8_q9up_bits, 1, 1,
mpc8_q9up_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
scfi_vlc[0].table = scfi0_table;
scfi_vlc[0].table_allocated = 1 << MPC8_SCFI0_BITS;
init_vlc(&scfi_vlc[0], MPC8_SCFI0_BITS, MPC8_SCFI0_SIZE,
mpc8_scfi0_bits, 1, 1,
mpc8_scfi0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
scfi_vlc[1].table = scfi1_table;
scfi_vlc[1].table_allocated = 1 << MPC8_SCFI1_BITS;
init_vlc(&scfi_vlc[1], MPC8_SCFI1_BITS, MPC8_SCFI1_SIZE,
mpc8_scfi1_bits, 1, 1,
mpc8_scfi1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
dscf_vlc[0].table = dscf0_table;
dscf_vlc[0].table_allocated = 560;
init_vlc(&dscf_vlc[0], MPC8_DSCF0_BITS, MPC8_DSCF0_SIZE,
mpc8_dscf0_bits, 1, 1,
mpc8_dscf0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
dscf_vlc[1].table = dscf1_table;
dscf_vlc[1].table_allocated = 598;
init_vlc(&dscf_vlc[1], MPC8_DSCF1_BITS, MPC8_DSCF1_SIZE,
mpc8_dscf1_bits, 1, 1,
mpc8_dscf1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
q3_vlc[0].table = q3_0_table;
q3_vlc[0].table_allocated = 512;
ff_init_vlc_sparse(&q3_vlc[0], MPC8_Q3_BITS, MPC8_Q3_SIZE,
mpc8_q3_bits, 1, 1,
mpc8_q3_codes, 1, 1,
mpc8_q3_syms, 1, 1, INIT_VLC_USE_NEW_STATIC);
q3_vlc[1].table = q3_1_table;
q3_vlc[1].table_allocated = 516;
ff_init_vlc_sparse(&q3_vlc[1], MPC8_Q4_BITS, MPC8_Q4_SIZE,
mpc8_q4_bits, 1, 1,
mpc8_q4_codes, 1, 1,
mpc8_q4_syms, 1, 1, INIT_VLC_USE_NEW_STATIC);
for(i = 0; i < 2; i++){
res_vlc[i].table = &codes_table[vlc_offsets[0+i]];
res_vlc[i].table_allocated = vlc_offsets[1+i] - vlc_offsets[0+i];
init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE,
&mpc8_res_bits[i], 1, 1,
&mpc8_res_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
q2_vlc[i].table = &codes_table[vlc_offsets[2+i]];
q2_vlc[i].table_allocated = vlc_offsets[3+i] - vlc_offsets[2+i];
init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE,
&mpc8_q2_bits[i], 1, 1,
&mpc8_q2_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
quant_vlc[0][i].table = &codes_table[vlc_offsets[4+i]];
quant_vlc[0][i].table_allocated = vlc_offsets[5+i] - vlc_offsets[4+i];
init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE,
&mpc8_q5_bits[i], 1, 1,
&mpc8_q5_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
quant_vlc[1][i].table = &codes_table[vlc_offsets[6+i]];
quant_vlc[1][i].table_allocated = vlc_offsets[7+i] - vlc_offsets[6+i];
init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE,
&mpc8_q6_bits[i], 1, 1,
&mpc8_q6_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
quant_vlc[2][i].table = &codes_table[vlc_offsets[8+i]];
quant_vlc[2][i].table_allocated = vlc_offsets[9+i] - vlc_offsets[8+i];
init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE,
&mpc8_q7_bits[i], 1, 1,
&mpc8_q7_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
quant_vlc[3][i].table = &codes_table[vlc_offsets[10+i]];
quant_vlc[3][i].table_allocated = vlc_offsets[11+i] - vlc_offsets[10+i];
init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE,
&mpc8_q8_bits[i], 1, 1,
&mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
}
vlc_initialized = 1;
return 0;
}
static int read_stream_mux_config(struct LATMContext *latmctx,
GetBitContext *gb)
{
int ret, audio_mux_version = get_bits(gb, 1);
latmctx->audio_mux_version_A = 0;
if (audio_mux_version)
latmctx->audio_mux_version_A = get_bits(gb, 1);
if (!latmctx->audio_mux_version_A) {
if (audio_mux_version)
latm_get_value(gb); // taraFullness
skip_bits(gb, 1); // allStreamSameTimeFraming
skip_bits(gb, 6); // numSubFrames
// numPrograms
if (get_bits(gb, 4)) { // numPrograms
av_log_missing_feature(latmctx->aac_ctx.avctx,
"multiple programs are not supported\n", 1);
return AVERROR_PATCHWELCOME;
}
// for each program (which there is only on in DVB)
// for each layer (which there is only on in DVB)
if (get_bits(gb, 3)) { // numLayer
av_log_missing_feature(latmctx->aac_ctx.avctx,
"multiple layers are not supported\n", 1);
return AVERROR_PATCHWELCOME;
}
// for all but first stream: use_same_config = get_bits(gb, 1);
if (!audio_mux_version) {
ret = latm_decode_audio_specific_config(latmctx, gb);
if (ret < 0)
return ret;
} else {
int ascLen = latm_get_value(gb);
ret = latm_decode_audio_specific_config(latmctx, gb);
if (ret < 0)
return ret;
ascLen -= ret;
skip_bits_long(gb, ascLen);
}
latmctx->frame_length_type = get_bits(gb, 3);
switch (latmctx->frame_length_type) {
case 0:
skip_bits(gb, 8); // latmBufferFullness
break;
case 1:
latmctx->frame_length = get_bits(gb, 9);
break;
case 3:
case 4:
case 5:
skip_bits(gb, 6); // CELP frame length table index
break;
case 6:
case 7:
skip_bits(gb, 1); // HVXC frame length table index
break;
}
if (get_bits(gb, 1)) { // other data
if (audio_mux_version) {
latm_get_value(gb); // other_data_bits
} else {
int esc;
do {
esc = get_bits(gb, 1);
skip_bits(gb, 8);
} while (esc);
}
}
if (get_bits(gb, 1)) // crc present
skip_bits(gb, 8); // config_crc
}
return 0;
}
/**
* This filter creates an MPEG-4 AudioSpecificConfig from an MPEG-2/4
* ADTS header and removes the ADTS header.
*/
static int aac_adtstoasc_filter(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size,
int keyframe)
{
GetBitContext gb;
PutBitContext pb;
AACADTSHeaderInfo hdr;
AACBSFContext *ctx = bsfc->priv_data;
init_get_bits(&gb, buf, AAC_ADTS_HEADER_SIZE*8);
*poutbuf = (uint8_t*) buf;
*poutbuf_size = buf_size;
if (avctx->extradata)
if (show_bits(&gb, 12) != 0xfff)
return 0;
if (ff_aac_parse_header(&gb, &hdr) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error parsing ADTS frame header!\n");
return -1;
}
if (!hdr.crc_absent && hdr.num_aac_frames > 1) {
av_log_missing_feature(avctx, "Multiple RDBs per frame with CRC is", 0);
return -1;
}
buf += AAC_ADTS_HEADER_SIZE + 2*!hdr.crc_absent;
buf_size -= AAC_ADTS_HEADER_SIZE + 2*!hdr.crc_absent;
if (!ctx->first_frame_done) {
int pce_size = 0;
uint8_t pce_data[MAX_PCE_SIZE];
if (!hdr.chan_config) {
init_get_bits(&gb, buf, buf_size);
if (get_bits(&gb, 3) != 5) {
av_log_missing_feature(avctx, "PCE based channel configuration, where the PCE is not the first syntax element is", 0);
return -1;
}
init_put_bits(&pb, pce_data, MAX_PCE_SIZE);
pce_size = ff_copy_pce_data(&pb, &gb)/8;
flush_put_bits(&pb);
buf_size -= get_bits_count(&gb)/8;
buf += get_bits_count(&gb)/8;
}
avctx->extradata_size = 2 + pce_size;
avctx->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
init_put_bits(&pb, avctx->extradata, avctx->extradata_size);
put_bits(&pb, 5, hdr.object_type);
put_bits(&pb, 4, hdr.sampling_index);
put_bits(&pb, 4, hdr.chan_config);
put_bits(&pb, 1, 0); //frame length - 1024 samples
put_bits(&pb, 1, 0); //does not depend on core coder
put_bits(&pb, 1, 0); //is not extension
flush_put_bits(&pb);
if (pce_size) {
memcpy(avctx->extradata + 2, pce_data, pce_size);
}
ctx->first_frame_done = 1;
}
*poutbuf = (uint8_t*) buf;
*poutbuf_size = buf_size;
return 0;
}
static int skeleton_header(AVFormatContext *s, int idx)
{
struct ogg *ogg = s->priv_data;
struct ogg_stream *os = ogg->streams + idx;
AVStream *st = s->streams[idx];
uint8_t *buf = os->buf + os->pstart;
int version_major, version_minor;
int64_t start_num, start_den;
uint64_t start_granule;
int target_idx, start_time;
strcpy(st->codec->codec_name, "skeleton");
st->codec->codec_type = AVMEDIA_TYPE_DATA;
if (os->psize < 8)
return -1;
if (!strncmp(buf, "fishead", 8)) {
if (os->psize < 64)
return -1;
version_major = AV_RL16(buf+8);
version_minor = AV_RL16(buf+10);
if (version_major != 3) {
av_log(s, AV_LOG_WARNING, "Unknown skeleton version %d.%d\n",
version_major, version_minor);
return -1;
}
// This is the overall start time. We use it for the start time of
// of the skeleton stream since if left unset lavf assumes 0,
// which we don't want since skeleton is timeless
// FIXME: the real meaning of this field is "start playback at
// this time which can be in the middle of a packet
start_num = AV_RL64(buf+12);
start_den = AV_RL64(buf+20);
if (start_den) {
int base_den;
av_reduce(&start_time, &base_den, start_num, start_den, INT_MAX);
avpriv_set_pts_info(st, 64, 1, base_den);
os->lastpts =
st->start_time = start_time;
}
} else if (!strncmp(buf, "fisbone", 8)) {
if (os->psize < 52)
return -1;
target_idx = ogg_find_stream(ogg, AV_RL32(buf+12));
start_granule = AV_RL64(buf+36);
if (os->start_granule != OGG_NOGRANULE_VALUE) {
av_log_missing_feature(s,
"multiple fisbone for the same stream", 0);
return 1;
}
if (target_idx >= 0 && start_granule != OGG_NOGRANULE_VALUE) {
os->start_granule = start_granule;
}
}
return 1;
}
/**
* @return 0 when a packet was written into /p pkt, and no more data is left;
* 1 when a packet was written into /p pkt, and more packets might be left;
* <0 when not enough data was provided to return a full packet, or on error.
*/
static int asfrtp_parse_packet(AVFormatContext *s, PayloadContext *asf,
AVStream *st, AVPacket *pkt,
uint32_t *timestamp,
const uint8_t *buf, int len, int flags)
{
ByteIOContext *pb = &asf->pb;
int res, mflags, len_off;
RTSPState *rt = s->priv_data;
if (!rt->asf_ctx)
return -1;
if (len > 0) {
int off, out_len;
if (len < 4)
return -1;
init_put_byte(pb, buf, len, 0, NULL, NULL, NULL, NULL);
mflags = get_byte(pb);
if (mflags & 0x80)
flags |= RTP_FLAG_KEY;
len_off = get_be24(pb);
if (mflags & 0x20) /**< relative timestamp */
url_fskip(pb, 4);
if (mflags & 0x10) /**< has duration */
url_fskip(pb, 4);
if (mflags & 0x8) /**< has location ID */
url_fskip(pb, 4);
off = url_ftell(pb);
av_freep(&asf->buf);
if (!(mflags & 0x40)) {
/**
* If 0x40 is not set, the len_off field specifies an offset of this
* packet's payload data in the complete (reassembled) ASF packet.
* This is used to spread one ASF packet over multiple RTP packets.
*/
if (asf->pktbuf && len_off != url_ftell(asf->pktbuf)) {
uint8_t *p;
url_close_dyn_buf(asf->pktbuf, &p);
asf->pktbuf = NULL;
av_free(p);
}
if (!len_off && !asf->pktbuf &&
(res = url_open_dyn_buf(&asf->pktbuf)) < 0)
return res;
if (!asf->pktbuf)
return AVERROR(EIO);
put_buffer(asf->pktbuf, buf + off, len - off);
if (!(flags & RTP_FLAG_MARKER))
return -1;
out_len = url_close_dyn_buf(asf->pktbuf, &asf->buf);
asf->pktbuf = NULL;
} else {
/**
* If 0x40 is set, the len_off field specifies the length of the
* next ASF packet that can be read from this payload data alone.
* This is commonly the same as the payload size, but could be
* less in case of packet splitting (i.e. multiple ASF packets in
* one RTP packet).
*/
if (len_off != len) {
av_log_missing_feature(s,
"RTSP-MS packet splitting", 1);
return -1;
}
asf->buf = av_malloc(len - off);
out_len = len - off;
memcpy(asf->buf, buf + off, len - off);
}
init_packetizer(pb, asf->buf, out_len);
pb->pos += rt->asf_pb_pos;
pb->eof_reached = 0;
rt->asf_ctx->pb = pb;
}
for (;;) {
int i;
res = av_read_packet(rt->asf_ctx, pkt);
rt->asf_pb_pos = url_ftell(pb);
if (res != 0)
break;
for (i = 0; i < s->nb_streams; i++) {
if (s->streams[i]->id == rt->asf_ctx->streams[pkt->stream_index]->id) {
pkt->stream_index = i;
return 1; // FIXME: return 0 if last packet
}
}
av_free_packet(pkt);
}
return res == 1 ? -1 : res;
}
