RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge commit '5d1007f74dd496d54b932242004382f44e3b22b4' 

* commit '5d1007f74dd496d54b932242004382f44e3b22b4':
  atrac3: initialize static tables in AVCodec.init_static_data()
  atrac3: separate window initialization from IMDCT initialization
  atrac3: move the 'frame_factor' field from ATRAC3Context to where it is used
  atrac3: remove unused ATRAC3Context field, bit_rate

Conflicts:
	libavcodec/atrac3.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-10-23 12:51:13 +02:00
parent 8748472f39 5d1007f74d
commit 7bc6631dd0
1 changed files with 41 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
libavcodec/atrac3.c
View File

@ -91,7 +91,6 @@ typedef struct ATRAC3Context {
//@{
/** stream data */
int coding_mode;
int bit_rate;
int sample_rate;
ChannelUnit *units;
@ -111,7 +110,6 @@ typedef struct ATRAC3Context {
//@{
/** extradata */
int scrambled_stream;
int frame_factor;
//@}
FFTContext mdct_ctx;
@ -120,6 +118,7 @@ typedef struct ATRAC3Context {
} ATRAC3Context;
static DECLARE_ALIGNED(32, float, mdct_window)[MDCT_SIZE];
static VLC_TYPE atrac3_vlc_table[4096][2];
static VLC spectral_coeff_tab[7];
static float gain_tab1[16];
static float gain_tab2[31];
@ -177,7 +176,7 @@ static int decode_bytes(const uint8_t *input, uint8_t *out, int bytes)
return off;
}
static av_cold int init_atrac3_transforms(ATRAC3Context *q)
static av_cold void init_atrac3_window(void)
{
float enc_window[256];
int i;
@ -187,17 +186,12 @@ static av_cold int init_atrac3_transforms(ATRAC3Context *q)
for (i = 0; i < 256; i++)
enc_window[i] = (sin(((i + 0.5) / 256.0 - 0.5) * M_PI) + 1.0) * 0.5;
if (!mdct_window[0]) {
for (i = 0; i < 256; i++) {
mdct_window[i] = enc_window[i] /
(enc_window[ i] * enc_window[ i] +
enc_window[255 - i] * enc_window[255 - i]);
mdct_window[511 - i] = mdct_window[i];
}
for (i = 0; i < 256; i++) {
mdct_window[i] = enc_window[i] /
(enc_window[ i] * enc_window[ i] +
enc_window[255 - i] * enc_window[255 - i]);
mdct_window[511 - i] = mdct_window[i];
}
/* initialize the MDCT transform */
return ff_mdct_init(&q->mdct_ctx, 9, 1, 1.0 / 32768);
}
static av_cold int atrac3_decode_close(AVCodecContext *avctx)
@ -846,18 +840,40 @@ static int atrac3_decode_frame(AVCodecContext *avctx, void *data,
return avctx->block_align;
}
static void atrac3_init_static_data(AVCodec *codec)
{
int i;
init_atrac3_window();
ff_atrac_generate_tables();
/* Initialize the VLC tables. */
for (i = 0; i < 7; i++) {
spectral_coeff_tab[i].table = &atrac3_vlc_table[atrac3_vlc_offs[i]];
spectral_coeff_tab[i].table_allocated = atrac3_vlc_offs[i + 1] -
atrac3_vlc_offs[i ];
init_vlc(&spectral_coeff_tab[i], 9, huff_tab_sizes[i],
huff_bits[i], 1, 1,
huff_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
}
/* Generate gain tables */
for (i = 0; i < 16; i++)
gain_tab1[i] = exp2f (4 - i);
for (i = -15; i < 16; i++)
gain_tab2[i + 15] = exp2f (i * -0.125);
}
static av_cold int atrac3_decode_init(AVCodecContext *avctx)
{
int i, ret;
int version, delay, samples_per_frame;
int version, delay, samples_per_frame, frame_factor;
const uint8_t *edata_ptr = avctx->extradata;
ATRAC3Context *q = avctx->priv_data;
static VLC_TYPE atrac3_vlc_table[4096][2];
static int vlcs_initialized = 0;
/* Take data from the AVCodecContext (RM container). */
q->sample_rate = avctx->sample_rate;
q->bit_rate = avctx->bit_rate;
if (avctx->channels <= 0 || avctx->channels > 2) {
av_log(avctx, AV_LOG_ERROR, "Channel configuration error!\n");
@ -873,7 +889,7 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
q->coding_mode = bytestream_get_le16(&edata_ptr);
av_log(avctx, AV_LOG_DEBUG,"[8-9] %d\n",
bytestream_get_le16(&edata_ptr)); //Dupe of coding mode
q->frame_factor = bytestream_get_le16(&edata_ptr); // Unknown always 1
frame_factor = bytestream_get_le16(&edata_ptr); // Unknown always 1
av_log(avctx, AV_LOG_DEBUG,"[12-13] %d\n",
bytestream_get_le16(&edata_ptr)); // Unknown always 0
@ -884,12 +900,12 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
q->coding_mode = q->coding_mode ? JOINT_STEREO : STEREO;
q->scrambled_stream = 0;
if (avctx->block_align != 96 * avctx->channels * q->frame_factor &&
avctx->block_align != 152 * avctx->channels * q->frame_factor &&
avctx->block_align != 192 * avctx->channels * q->frame_factor) {
if (avctx->block_align != 96 * avctx->channels * frame_factor &&
avctx->block_align != 152 * avctx->channels * frame_factor &&
avctx->block_align != 192 * avctx->channels * frame_factor) {
av_log(avctx, AV_LOG_ERROR, "Unknown frame/channel/frame_factor "
"configuration %d/%d/%d\n", avctx->block_align,
avctx->channels, q->frame_factor);
avctx->channels, frame_factor);
return AVERROR_INVALIDDATA;
}
} else if (avctx->extradata_size == 10) {
@ -944,37 +960,15 @@ static av_cold int atrac3_decode_init(AVCodecContext *avctx)
if (q->decoded_bytes_buffer == NULL)
return AVERROR(ENOMEM);
/* Initialize the VLC tables. */
if (!vlcs_initialized) {
for (i = 0; i < 7; i++) {
spectral_coeff_tab[i].table = &atrac3_vlc_table[atrac3_vlc_offs[i]];
spectral_coeff_tab[i].table_allocated = atrac3_vlc_offs[i + 1] -
atrac3_vlc_offs[i ];
init_vlc(&spectral_coeff_tab[i], 9, huff_tab_sizes[i],
huff_bits[i], 1, 1,
huff_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
}
vlcs_initialized = 1;
}
avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
if ((ret = init_atrac3_transforms(q))) {
/* initialize the MDCT transform */
if ((ret = ff_mdct_init(&q->mdct_ctx, 9, 1, 1.0 / 32768)) < 0) {
av_log(avctx, AV_LOG_ERROR, "Error initializing MDCT\n");
av_freep(&q->decoded_bytes_buffer);
return ret;
}
ff_atrac_generate_tables();
/* Generate gain tables */
for (i = 0; i < 16; i++)
gain_tab1[i] = exp2f (4 - i);
for (i = -15; i < 16; i++)
gain_tab2[i + 15] = exp2f (i * -0.125);
/* init the joint-stereo decoding data */
q->weighting_delay[0] = 0;
q->weighting_delay[1] = 7;
@ -1010,6 +1004,7 @@ AVCodec ff_atrac3_decoder = {
.id = AV_CODEC_ID_ATRAC3,
.priv_data_size = sizeof(ATRAC3Context),
.init = atrac3_decode_init,
.init_static_data = atrac3_init_static_data,
.close = atrac3_decode_close,
.decode = atrac3_decode_frame,
.capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1,