#include "avcodec.h"
#include "internal.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "dsputil.h"
#include "lpc.h"
#include <math.h>
#include <string.h>
+union float754 { float f; uint32_t i; };
+
static VLC vlc_scalefactors;
static VLC vlc_spectral[11];
+static ChannelElement* get_che(AACContext *ac, int type, int elem_id) {
+ static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 };
+ if (ac->tag_che_map[type][elem_id]) {
+ return ac->tag_che_map[type][elem_id];
+ }
+ if (ac->tags_mapped >= tags_per_config[ac->m4ac.chan_config]) {
+ return NULL;
+ }
+ switch (ac->m4ac.chan_config) {
+ case 7:
+ if (ac->tags_mapped == 3 && type == TYPE_CPE) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][2];
+ }
+ case 6:
+ /* Some streams incorrectly code 5.1 audio as SCE[0] CPE[0] CPE[1] SCE[1]
+ instead of SCE[0] CPE[0] CPE[0] LFE[0]. If we seem to have
+ encountered such a stream, transfer the LFE[0] element to SCE[1] */
+ if (ac->tags_mapped == tags_per_config[ac->m4ac.chan_config] - 1 && (type == TYPE_LFE || type == TYPE_SCE)) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[type][elem_id] = ac->che[TYPE_LFE][0];
+ }
+ case 5:
+ if (ac->tags_mapped == 2 && type == TYPE_CPE) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][1];
+ }
+ case 4:
+ if (ac->tags_mapped == 2 && ac->m4ac.chan_config == 4 && type == TYPE_SCE) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][1];
+ }
+ case 3:
+ case 2:
+ if (ac->tags_mapped == (ac->m4ac.chan_config != 2) && type == TYPE_CPE) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[TYPE_CPE][elem_id] = ac->che[TYPE_CPE][0];
+ } else if (ac->m4ac.chan_config == 2) {
+ return NULL;
+ }
+ case 1:
+ if (!ac->tags_mapped && type == TYPE_SCE) {
+ ac->tags_mapped++;
+ return ac->tag_che_map[TYPE_SCE][elem_id] = ac->che[TYPE_SCE][0];
+ }
+ default:
+ return NULL;
+ }
+}
+
/**
* Configure output channel order based on the current program configuration element.
*
* @return Returns error status. 0 - OK, !0 - error
*/
static int output_configure(AACContext *ac, enum ChannelPosition che_pos[4][MAX_ELEM_ID],
- enum ChannelPosition new_che_pos[4][MAX_ELEM_ID]) {
+ enum ChannelPosition new_che_pos[4][MAX_ELEM_ID], int channel_config) {
AVCodecContext *avctx = ac->avccontext;
int i, type, channels = 0;
- if(!memcmp(che_pos, new_che_pos, 4 * MAX_ELEM_ID * sizeof(new_che_pos[0][0])))
- return 0; /* no change */
-
memcpy(che_pos, new_che_pos, 4 * MAX_ELEM_ID * sizeof(new_che_pos[0][0]));
/* Allocate or free elements depending on if they are in the
}
}
+ if (channel_config) {
+ memset(ac->tag_che_map, 0, 4 * MAX_ELEM_ID * sizeof(ac->che[0][0]));
+ ac->tags_mapped = 0;
+ } else {
+ memcpy(ac->tag_che_map, ac->che, 4 * MAX_ELEM_ID * sizeof(ac->che[0][0]));
+ ac->tags_mapped = 4*MAX_ELEM_ID;
+ }
+
avctx->channels = channels;
+
return 0;
}
if((ret = set_default_channel_config(ac, new_che_pos, channel_config)))
return ret;
}
- if((ret = output_configure(ac, ac->che_pos, new_che_pos)))
+ if((ret = output_configure(ac, ac->che_pos, new_che_pos, channel_config)))
return ret;
if (extension_flag) {
memset(new_che_pos, 0, 4 * MAX_ELEM_ID * sizeof(new_che_pos[0][0]));
if(set_default_channel_config(ac, new_che_pos, avccontext->channels - (avccontext->channels == 8)))
return -1;
- if(output_configure(ac, ac->che_pos, new_che_pos))
+ if(output_configure(ac, ac->che_pos, new_che_pos, 1))
return -1;
ac->m4ac.sample_rate = avccontext->sample_rate;
- } else {
- ff_log_missing_feature(ac->avccontext, "Implicit channel configuration is", 0);
- return -1;
}
avccontext->sample_fmt = SAMPLE_FMT_S16;
}
static av_always_inline float flt16_round(float pf) {
- int exp;
- pf = frexpf(pf, &exp);
- pf = ldexpf(roundf(ldexpf(pf, 8)), exp-8);
- return pf;
+ union float754 tmp;
+ tmp.f = pf;
+ tmp.i = (tmp.i + 0x00008000U) & 0xFFFF0000U;
+ return tmp.f;
}
static av_always_inline float flt16_even(float pf) {
- int exp;
- pf = frexpf(pf, &exp);
- pf = ldexpf(rintf(ldexpf(pf, 8)), exp-8);
- return pf;
+ union float754 tmp;
+ tmp.f = pf;
+ tmp.i = (tmp.i + 0x00007FFFU + (tmp.i & 0x00010000U>>16)) & 0xFFFF0000U;
+ return tmp.f;
}
static av_always_inline float flt16_trunc(float pf) {
- int exp;
- pf = frexpf(pf, &exp);
- pf = ldexpf(truncf(ldexpf(pf, 8)), exp-8);
- return pf;
+ union float754 pun;
+ pun.f = pf;
+ pun.i &= 0xFFFF0000U;
+ return pun.f;
}
static void predict(AACContext * ac, PredictorState * ps, float* coef, int output_enable) {
} else
coup->ch_select[c] = 2;
}
- coup->coupling_point += get_bits1(gb);
-
- if (coup->coupling_point == 2) {
- av_log(ac->avccontext, AV_LOG_ERROR,
- "Independently switched CCE with 'invalid' domain signalled.\n");
- memset(coup, 0, sizeof(ChannelCoupling));
- return -1;
- }
+ coup->coupling_point += get_bits1(gb) || (coup->coupling_point>>1);
sign = get_bits(gb, 1);
scale = pow(2., pow(2., (int)get_bits(gb, 2) - 3));
for (g = 0; g < ics->num_window_groups; g++) {
for (i = 0; i < ics->max_sfb; i++, idx++) {
if (cce->ch[0].band_type[idx] != ZERO_BT) {
+ const float gain = cce->coup.gain[index][idx];
for (group = 0; group < ics->group_len[g]; group++) {
for (k = offsets[i]; k < offsets[i+1]; k++) {
// XXX dsputil-ize
- dest[group*128+k] += cce->coup.gain[index][idx] * src[group*128+k];
+ dest[group*128+k] += gain * src[group*128+k];
}
}
}
ac->m4ac.sample_rate = hdr_info.sample_rate;
ac->m4ac.sampling_index = hdr_info.sampling_index;
ac->m4ac.object_type = hdr_info.object_type;
- }
- if (hdr_info.num_aac_frames == 1) {
- if (!hdr_info.crc_absent)
- skip_bits(gb, 16);
- } else {
- ff_log_missing_feature(ac->avccontext, "More than one AAC RDB per ADTS frame is", 0);
- return -1;
+ if (hdr_info.num_aac_frames == 1) {
+ if (!hdr_info.crc_absent)
+ skip_bits(gb, 16);
+ } else {
+ ff_log_missing_feature(ac->avccontext, "More than one AAC RDB per ADTS frame is", 0);
+ return -1;
+ }
}
return size;
}
-static int aac_decode_frame(AVCodecContext * avccontext, void * data, int * data_size, const uint8_t * buf, int buf_size) {
+static int aac_decode_frame(AVCodecContext * avccontext, void * data, int * data_size, AVPacket *avpkt) {
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
AACContext * ac = avccontext->priv_data;
+ ChannelElement * che = NULL;
GetBitContext gb;
enum RawDataBlockType elem_type;
int err, elem_id, data_size_tmp;
init_get_bits(&gb, buf, buf_size*8);
if (show_bits(&gb, 12) == 0xfff) {
- if ((err = parse_adts_frame_header(ac, &gb)) < 0) {
+ if (parse_adts_frame_header(ac, &gb) < 0) {
av_log(avccontext, AV_LOG_ERROR, "Error decoding AAC frame header.\n");
return -1;
}
// parse
while ((elem_type = get_bits(&gb, 3)) != TYPE_END) {
elem_id = get_bits(&gb, 4);
- err = -1;
- if(elem_type == TYPE_SCE && elem_id == 1 &&
- !ac->che[TYPE_SCE][elem_id] && ac->che[TYPE_LFE][0]) {
- /* Some streams incorrectly code 5.1 audio as SCE[0] CPE[0] CPE[1] SCE[1]
- instead of SCE[0] CPE[0] CPE[0] LFE[0]. If we seem to have
- encountered such a stream, transfer the LFE[0] element to SCE[1] */
- ac->che[TYPE_SCE][elem_id] = ac->che[TYPE_LFE][0];
- ac->che[TYPE_LFE][0] = NULL;
- }
- if(elem_type < TYPE_DSE && !ac->che[elem_type][elem_id]) {
+ if(elem_type < TYPE_DSE && !(che=get_che(ac, elem_type, elem_id))) {
av_log(ac->avccontext, AV_LOG_ERROR, "channel element %d.%d is not allocated\n", elem_type, elem_id);
return -1;
}
switch (elem_type) {
case TYPE_SCE:
- err = decode_ics(ac, &ac->che[TYPE_SCE][elem_id]->ch[0], &gb, 0, 0);
+ err = decode_ics(ac, &che->ch[0], &gb, 0, 0);
break;
case TYPE_CPE:
- err = decode_cpe(ac, &gb, ac->che[TYPE_CPE][elem_id]);
+ err = decode_cpe(ac, &gb, che);
break;
case TYPE_CCE:
- err = decode_cce(ac, &gb, ac->che[TYPE_CCE][elem_id]);
+ err = decode_cce(ac, &gb, che);
break;
case TYPE_LFE:
- err = decode_ics(ac, &ac->che[TYPE_LFE][elem_id]->ch[0], &gb, 0, 0);
+ err = decode_ics(ac, &che->ch[0], &gb, 0, 0);
break;
case TYPE_DSE:
memset(new_che_pos, 0, 4 * MAX_ELEM_ID * sizeof(new_che_pos[0][0]));
if((err = decode_pce(ac, new_che_pos, &gb)))
break;
- err = output_configure(ac, ac->che_pos, new_che_pos);
+ err = output_configure(ac, ac->che_pos, new_che_pos, 0);
break;
}
projects / frescor / ffmpeg.git / blobdiff