* MPEG Audio decoder
*/
-#define UNCHECKED_BITSTREAM_READER 1
-
#include "libavutil/audioconvert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "mathops.h"
#include "mpegaudiodsp.h"
+#include "dsputil.h"
/*
* TODO:
#define BACKSTEP_SIZE 512
#define EXTRABYTES 24
+#define LAST_BUF_SIZE 2 * BACKSTEP_SIZE + EXTRABYTES
/* layer 3 "granule" */
typedef struct GranuleDef {
typedef struct MPADecodeContext {
MPA_DECODE_HEADER
- uint8_t last_buf[2 * BACKSTEP_SIZE + EXTRABYTES];
+ uint8_t last_buf[LAST_BUF_SIZE];
int last_buf_size;
/* next header (used in free format parsing) */
uint32_t free_format_next_header;
int err_recognition;
AVCodecContext* avctx;
MPADSPContext mpadsp;
+ DSPContext dsp;
AVFrame frame;
} MPADecodeContext;
static INTFLOAT is_table[2][16];
static INTFLOAT is_table_lsf[2][2][16];
static INTFLOAT csa_table[8][4];
-/** Window for MDCT. Note that only the component [0,17] and [20,37] are used,
- the components 18 and 19 are there only to assure 128-bit alignment for asm
- */
-DECLARE_ALIGNED(16, static INTFLOAT, mdct_win)[8][40];
static int16_t division_tab3[1<<6 ];
static int16_t division_tab5[1<<8 ];
csa_table[i][3] = ca - cs;
#endif
}
-
- /* compute mdct windows */
- for (i = 0; i < 36; i++) {
- for (j = 0; j < 4; j++) {
- double d;
-
- if (j == 2 && i % 3 != 1)
- continue;
-
- d = sin(M_PI * (i + 0.5) / 36.0);
- if (j == 1) {
- if (i >= 30) d = 0;
- else if (i >= 24) d = sin(M_PI * (i - 18 + 0.5) / 12.0);
- else if (i >= 18) d = 1;
- } else if (j == 3) {
- if (i < 6) d = 0;
- else if (i < 12) d = sin(M_PI * (i - 6 + 0.5) / 12.0);
- else if (i < 18) d = 1;
- }
- //merge last stage of imdct into the window coefficients
- d *= 0.5 / cos(M_PI * (2 * i + 19) / 72);
-
- if (j == 2)
- mdct_win[j][i/3] = FIXHR((d / (1<<5)));
- else {
- int idx = i < 18 ? i : i + 2;
- mdct_win[j][idx] = FIXHR((d / (1<<5)));
- }
- }
- }
-
- /* NOTE: we do frequency inversion adter the MDCT by changing
- the sign of the right window coefs */
- for (j = 0; j < 4; j++) {
- for (i = 0; i < 40; i += 2) {
- mdct_win[j + 4][i ] = mdct_win[j][i ];
- mdct_win[j + 4][i + 1] = -mdct_win[j][i + 1];
- }
- }
}
static av_cold int decode_init(AVCodecContext * avctx)
s->avctx = avctx;
ff_mpadsp_init(&s->mpadsp);
+ ff_dsputil_init(&s->dsp, avctx);
avctx->sample_fmt= OUT_FMT;
s->err_recognition = avctx->err_recognition;
/* skip extension bits */
bits_left = end_pos2 - get_bits_count(&s->gb);
//av_log(NULL, AV_LOG_ERROR, "left:%d buf:%p\n", bits_left, s->in_gb.buffer);
- if (bits_left < 0 && (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT))) {
+ if (bits_left < 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_COMPLIANT))) {
av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left);
s_index=0;
- } else if (bits_left > 0 && (s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE))) {
+ } else if (bits_left > 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE))) {
av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left);
s_index = 0;
}
/* ms stereo ONLY */
/* NOTE: the 1/sqrt(2) normalization factor is included in the
global gain */
+#if CONFIG_FLOAT
+ s-> dsp.butterflies_float(g0->sb_hybrid, g1->sb_hybrid, 576);
+#else
tab0 = g0->sb_hybrid;
tab1 = g1->sb_hybrid;
for (i = 0; i < 576; i++) {
tab0[i] = tmp0 + tmp1;
tab1[i] = tmp0 - tmp1;
}
+#endif
}
}
mdct_long_end = sblimit;
}
- buf = mdct_buf;
- ptr = g->sb_hybrid;
- for (j = 0; j < mdct_long_end; j++) {
- int win_idx = (g->switch_point && j < 2) ? 0 : g->block_type;
- /* apply window & overlap with previous buffer */
- out_ptr = sb_samples + j;
- /* select window */
- win = mdct_win[win_idx + (4 & -(j & 1))];
- s->mpadsp.RENAME(imdct36)(out_ptr, buf, ptr, win);
- out_ptr += 18 * SBLIMIT;
- ptr += 18;
- buf += 18;
- }
+ s->mpadsp.RENAME(imdct36_blocks)(sb_samples, mdct_buf, g->sb_hybrid,
+ mdct_long_end, g->switch_point,
+ g->block_type);
+
+ buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3);
+ ptr = g->sb_hybrid + 18 * mdct_long_end;
+
for (j = mdct_long_end; j < sblimit; j++) {
/* select frequency inversion */
- win = mdct_win[2 + (4 & -(j & 1))];
+ win = RENAME(ff_mdct_win)[2 + (4 & -(j & 1))];
out_ptr = sb_samples + j;
for (i = 0; i < 6; i++) {
- *out_ptr = buf[i];
+ *out_ptr = buf[4*i];
out_ptr += SBLIMIT;
}
imdct12(out2, ptr + 0);
for (i = 0; i < 6; i++) {
- *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[i + 6*1];
- buf[i + 6*2] = MULH3(out2[i + 6], win[i + 6], 1);
+ *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*1)];
+ buf[4*(i + 6*2)] = MULH3(out2[i + 6], win[i + 6], 1);
out_ptr += SBLIMIT;
}
imdct12(out2, ptr + 1);
for (i = 0; i < 6; i++) {
- *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[i + 6*2];
- buf[i + 6*0] = MULH3(out2[i + 6], win[i + 6], 1);
+ *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*2)];
+ buf[4*(i + 6*0)] = MULH3(out2[i + 6], win[i + 6], 1);
out_ptr += SBLIMIT;
}
imdct12(out2, ptr + 2);
for (i = 0; i < 6; i++) {
- buf[i + 6*0] = MULH3(out2[i ], win[i ], 1) + buf[i + 6*0];
- buf[i + 6*1] = MULH3(out2[i + 6], win[i + 6], 1);
- buf[i + 6*2] = 0;
+ buf[4*(i + 6*0)] = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*0)];
+ buf[4*(i + 6*1)] = MULH3(out2[i + 6], win[i + 6], 1);
+ buf[4*(i + 6*2)] = 0;
}
ptr += 18;
- buf += 18;
+ buf += (j&3) != 3 ? 1 : (4*18-3);
}
/* zero bands */
for (j = sblimit; j < SBLIMIT; j++) {
/* overlap */
out_ptr = sb_samples + j;
for (i = 0; i < 18; i++) {
- *out_ptr = buf[i];
- buf[i] = 0;
+ *out_ptr = buf[4*i];
+ buf[4*i] = 0;
out_ptr += SBLIMIT;
}
- buf += 18;
+ buf += (j&3) != 3 ? 1 : (4*18-3);
}
}
if (!s->adu_mode) {
int skip;
const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb)>>3);
+ int extrasize = av_clip(get_bits_left(&s->gb) >> 3, 0, EXTRABYTES);
assert((get_bits_count(&s->gb) & 7) == 0);
/* now we get bits from the main_data_begin offset */
av_dlog(s->avctx, "seekback: %d\n", main_data_begin);
//av_log(NULL, AV_LOG_ERROR, "backstep:%d, lastbuf:%d\n", main_data_begin, s->last_buf_size);
- memcpy(s->last_buf + s->last_buf_size, ptr, EXTRABYTES);
+ memcpy(s->last_buf + s->last_buf_size, ptr, extrasize);
s->in_gb = s->gb;
init_get_bits(&s->gb, s->last_buf, s->last_buf_size*8);
#if !UNCHECKED_BITSTREAM_READER
- s->gb.size_in_bits_plus8 += EXTRABYTES * 8;
+ s->gb.size_in_bits_plus8 += FFMAX(extrasize, LAST_BUF_SIZE - s->last_buf_size) * 8;
#endif
- skip_bits_long(&s->gb, 8*(s->last_buf_size - main_data_begin));
+ s->last_buf_size <<= 3;
+ for (gr = 0; gr < nb_granules && (s->last_buf_size >> 3) < main_data_begin; gr++) {
+ for (ch = 0; ch < s->nb_channels; ch++) {
+ g = &s->granules[ch][gr];
+ s->last_buf_size += g->part2_3_length;
+ memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid));
+ }
+ }
+ skip = s->last_buf_size - 8 * main_data_begin;
+ if (skip >= s->gb.size_in_bits && s->in_gb.buffer) {
+ skip_bits_long(&s->in_gb, skip - s->gb.size_in_bits);
+ s->gb = s->in_gb;
+ s->in_gb.buffer = NULL;
+ } else {
+ skip_bits_long(&s->gb, skip);
+ }
+ } else {
+ gr = 0;
}
- for (gr = 0; gr < nb_granules; gr++) {
+ for (; gr < nb_granules; gr++) {
for (ch = 0; ch < s->nb_channels; ch++) {
g = &s->granules[ch][gr];
- if (get_bits_count(&s->gb) < 0) {
- av_log(s->avctx, AV_LOG_DEBUG, "mdb:%d, lastbuf:%d skipping granule %d\n",
- main_data_begin, s->last_buf_size, gr);
- skip_bits_long(&s->gb, g->part2_3_length);
- memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid));
- if (get_bits_count(&s->gb) >= s->gb.size_in_bits && s->in_gb.buffer) {
- skip_bits_long(&s->in_gb, get_bits_count(&s->gb) - s->gb.size_in_bits);
- s->gb = s->in_gb;
- s->in_gb.buffer = NULL;
- }
- continue;
- }
-
bits_pos = get_bits_count(&s->gb);
if (!s->lsf) {
avctx->channel_layout = s->nb_channels == 1 ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
if (!avctx->bit_rate)
avctx->bit_rate = s->bit_rate;
- avctx->sub_id = s->layer;
if (s->frame_size <= 0 || s->frame_size > buf_size) {
av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
avctx->channels = s->nb_channels;
if (!avctx->bit_rate)
avctx->bit_rate = s->bit_rate;
- avctx->sub_id = s->layer;
s->frame_size = len;
-#if FF_API_PARSE_FRAME
- if (avctx->parse_only)
- out_size = buf_size;
- else
-#endif
out_size = mp_decode_frame(s, NULL, buf, buf_size);
*got_frame_ptr = 1;
m = s->mp3decctx[fr];
assert(m != NULL);
+ if (fsize < HEADER_SIZE) {
+ av_log(avctx, AV_LOG_ERROR, "Frame size smaller than header size\n");
+ return AVERROR_INVALIDDATA;
+ }
header = (AV_RB32(buf) & 0x000fffff) | s->syncword; // patch header
if (ff_mpa_check_header(header) < 0) // Bad header, discard block
.priv_data_size = sizeof(MPADecodeContext),
.init = decode_init,
.decode = decode_frame,
-#if FF_API_PARSE_FRAME
- .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1,
-#else
.capabilities = CODEC_CAP_DR1,
-#endif
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("MP1 (MPEG audio layer 1)"),
};
.priv_data_size = sizeof(MPADecodeContext),
.init = decode_init,
.decode = decode_frame,
-#if FF_API_PARSE_FRAME
- .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1,
-#else
.capabilities = CODEC_CAP_DR1,
-#endif
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("MP2 (MPEG audio layer 2)"),
};
.priv_data_size = sizeof(MPADecodeContext),
.init = decode_init,
.decode = decode_frame,
-#if FF_API_PARSE_FRAME
- .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1,
-#else
.capabilities = CODEC_CAP_DR1,
-#endif
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"),
};
.priv_data_size = sizeof(MPADecodeContext),
.init = decode_init,
.decode = decode_frame_adu,
-#if FF_API_PARSE_FRAME
- .capabilities = CODEC_CAP_PARSE_ONLY | CODEC_CAP_DR1,
-#else
.capabilities = CODEC_CAP_DR1,
-#endif
.flush = flush,
.long_name = NULL_IF_CONFIG_SMALL("ADU (Application Data Unit) MP3 (MPEG audio layer 3)"),
};
projects / ffmpeg / blobdiff