static av_cold int mp_decode_init(AVCodecContext *avctx)
{
MotionPixelsContext *mp = avctx->priv_data;
int w4 = (avctx->width + 3) & ~3;
int h4 = (avctx->height + 3) & ~3;
if(avctx->extradata_size < 2) {
av_log(avctx, AV_LOG_ERROR, "extradata too small\n");
return AVERROR_INVALIDDATA;
}
motionpixels_tableinit();
mp->avctx = avctx;
ff_dsputil_init(&mp->dsp, avctx);
mp->changes_map = av_mallocz(avctx->width * h4);
mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
mp->vpt = av_mallocz(avctx->height * sizeof(YuvPixel));
mp->hpt = av_mallocz(h4 * w4 / 16 * sizeof(YuvPixel));
if (!mp->changes_map || !mp->vpt || !mp->hpt) {
av_freep(&mp->changes_map);
av_freep(&mp->vpt);
av_freep(&mp->hpt);
return AVERROR(ENOMEM);
}
avctx->pix_fmt = AV_PIX_FMT_RGB555;
mp->frame = av_frame_alloc();
if (!mp->frame) {
mp_decode_end(avctx);
return AVERROR(ENOMEM);
}
return 0;
}
av_cold int ffv1_common_init(AVCodecContext *avctx)
{
FFV1Context *s = avctx->priv_data;
if (!avctx->width || !avctx->height)
return AVERROR_INVALIDDATA;
s->avctx = avctx;
s->flags = avctx->flags;
s->picture.f = avcodec_alloc_frame();
s->last_picture.f = av_frame_alloc();
if (!s->picture.f || !s->last_picture.f)
return AVERROR(ENOMEM);
ff_dsputil_init(&s->dsp, avctx);
s->width = avctx->width;
s->height = avctx->height;
// defaults
s->num_h_slices = 1;
s->num_v_slices = 1;
return 0;
}
static av_cold int decode_init(AVCodecContext * avctx) {
NellyMoserDecodeContext *s = avctx->priv_data;
s->avctx = avctx;
s->imdct_out = s->imdct_buf[0];
s->imdct_prev = s->imdct_buf[1];
av_lfg_init(&s->random_state, 0);
ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);
ff_dsputil_init(&s->dsp, avctx);
s->scale_bias = 1.0/(32768*8);
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
/* Generate overlap window */
if (!ff_sine_128[127])
ff_init_ff_sine_windows(7);
avctx->channels = 1;
avctx->channel_layout = AV_CH_LAYOUT_MONO;
avcodec_get_frame_defaults(&s->frame);
avctx->coded_frame = &s->frame;
return 0;
}
static av_cold int jpg_init(AVCodecContext *avctx, JPGContext *c)
{
int ret;
ret = build_vlc(&c->dc_vlc[0], avpriv_mjpeg_bits_dc_luminance,
avpriv_mjpeg_val_dc, 12, 0);
if (ret)
return ret;
ret = build_vlc(&c->dc_vlc[1], avpriv_mjpeg_bits_dc_chrominance,
avpriv_mjpeg_val_dc, 12, 0);
if (ret)
return ret;
ret = build_vlc(&c->ac_vlc[0], avpriv_mjpeg_bits_ac_luminance,
avpriv_mjpeg_val_ac_luminance, 251, 1);
if (ret)
return ret;
ret = build_vlc(&c->ac_vlc[1], avpriv_mjpeg_bits_ac_chrominance,
avpriv_mjpeg_val_ac_chrominance, 251, 1);
if (ret)
return ret;
ff_dsputil_init(&c->dsp, avctx);
ff_init_scantable(c->dsp.idct_permutation, &c->scantable,
ff_zigzag_direct);
return 0;
}
int main(int argc, char **argv)
{
AVCodecContext *ctx;
int c;
DSPContext cctx, mmxctx;
int flags[2] = { AV_CPU_FLAG_MMX, AV_CPU_FLAG_MMX2 };
int flags_size = HAVE_MMX2 ? 2 : 1;
for(;;) {
c = getopt(argc, argv, "h");
if (c == -1)
break;
switch(c) {
case 'h':
help();
return 1;
}
}
printf("Libav motion test\n");
ctx = avcodec_alloc_context3(NULL);
ctx->dsp_mask = AV_CPU_FLAG_FORCE;
ff_dsputil_init(&cctx, ctx);
for (c = 0; c < flags_size; c++) {
int x;
ctx->dsp_mask = AV_CPU_FLAG_FORCE | flags[c];
ff_dsputil_init(&mmxctx, ctx);
for (x = 0; x < 2; x++) {
printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
x ? 8 : 16, x ? 8 : 16);
test_motion("mmx", mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
test_motion("mmx_x2", mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
test_motion("mmx_y2", mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
}
}
av_free(ctx);
return 0;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
MadContext *s = avctx->priv_data;
s->avctx = avctx;
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
ff_dsputil_init(&s->dsp, avctx);
ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
ff_mpeg12_init_vlcs();
return 0;
}
av_cold void ff_asv_common_init(AVCodecContext *avctx) {
ASV1Context * const a = avctx->priv_data;
ff_dsputil_init(&a->dsp, avctx);
a->mb_width = (avctx->width + 15) / 16;
a->mb_height = (avctx->height + 15) / 16;
a->mb_width2 = (avctx->width + 0) / 16;
a->mb_height2 = (avctx->height + 0) / 16;
a->avctx= avctx;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
MadContext *t = avctx->priv_data;
MpegEncContext *s = &t->s;
s->avctx = avctx;
avctx->pix_fmt = PIX_FMT_YUV420P;
if (avctx->idct_algo == FF_IDCT_AUTO)
avctx->idct_algo = FF_IDCT_EA;
ff_dsputil_init(&s->dsp, avctx);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
ff_mpeg12_init_vlcs();
return 0;
}
int main(int argc, char **argv)
{
AVCodecContext *ctx;
int c;
DSPContext cctx, mmxctx;
int flags[2] = { AV_CPU_FLAG_MMX, AV_CPU_FLAG_MMXEXT };
int flags_size = HAVE_MMXEXT ? 2 : 1;
if (argc > 1) {
help();
return 1;
}
printf("ffmpeg motion test\n");
ctx = avcodec_alloc_context3(NULL);
ctx->dsp_mask = AV_CPU_FLAG_FORCE;
memset(&cctx, 0, sizeof(cctx));
ff_dsputil_init(&cctx, ctx);
for (c = 0; c < flags_size; c++) {
int x;
ctx->dsp_mask = AV_CPU_FLAG_FORCE | flags[c];
memset(&mmxctx, 0, sizeof(mmxctx));
ff_dsputil_init(&mmxctx, ctx);
for (x = 0; x < 2; x++) {
printf("%s for %dx%d pixels\n", c ? "mmx2" : "mmx",
x ? 8 : 16, x ? 8 : 16);
test_motion("mmx", mmxctx.pix_abs[x][0], cctx.pix_abs[x][0]);
test_motion("mmx_x2", mmxctx.pix_abs[x][1], cctx.pix_abs[x][1]);
test_motion("mmx_y2", mmxctx.pix_abs[x][2], cctx.pix_abs[x][2]);
test_motion("mmx_xy2", mmxctx.pix_abs[x][3], cctx.pix_abs[x][3]);
}
}
av_free(ctx);
return 0;
}
static av_cold int tqi_decode_init(AVCodecContext *avctx)
{
TqiContext *t = avctx->priv_data;
MpegEncContext *s = &t->s;
s->avctx = avctx;
ff_dsputil_init(&s->dsp, avctx);
ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
s->qscale = 1;
avctx->time_base = (AVRational){1, 15};
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
ff_mpeg12_init_vlcs();
return 0;
}
static av_cold int common_init(AVCodecContext *avctx){
HYuvContext *s = avctx->priv_data;
s->avctx= avctx;
s->flags= avctx->flags;
ff_dsputil_init(&s->dsp, avctx);
s->width= avctx->width;
s->height= avctx->height;
assert(s->width>0 && s->height>0);
return 0;
}
av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
int flip, int has_alpha)
{
int i;
s->avctx = avctx;
avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
ff_dsputil_init(&s->dsp, avctx);
ff_h264chroma_init(&s->h264chroma, 8);
ff_videodsp_init(&s->vdsp, 8);
ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id);
ff_init_scantable_permutation(s->dsp.idct_permutation, s->vp3dsp.idct_perm);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct);
for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) {
s->frames[i] = av_frame_alloc();
if (!s->frames[i]) {
ff_vp56_free(avctx);
return AVERROR(ENOMEM);
}
}
s->edge_emu_buffer_alloc = NULL;
s->above_blocks = NULL;
s->macroblocks = NULL;
s->quantizer = -1;
s->deblock_filtering = 1;
s->golden_frame = 0;
s->filter = NULL;
s->has_alpha = has_alpha;
s->modelp = &s->model;
if (flip) {
s->flip = -1;
s->frbi = 2;
s->srbi = 0;
} else {
s->flip = 1;
s->frbi = 0;
s->srbi = 2;
}
return 0;
}
av_cold void ff_huffyuv_common_init(AVCodecContext *avctx)
{
HYuvContext *s = avctx->priv_data;
s->avctx = avctx;
s->flags = avctx->flags;
ff_dsputil_init(&s->dsp, avctx);
ff_llviddsp_init(&s->llviddsp, avctx);
s->width = avctx->width;
s->height = avctx->height;
av_assert1(s->width > 0 && s->height > 0);
}
static av_cold int decode_init(AVCodecContext *avctx) {
NuvContext *c = avctx->priv_data;
avctx->pix_fmt = PIX_FMT_YUV420P;
c->pic.data[0] = NULL;
c->decomp_buf = NULL;
c->quality = -1;
c->width = 0;
c->height = 0;
c->codec_frameheader = avctx->codec_tag == MKTAG('R', 'J', 'P', 'G');
if (avctx->extradata_size)
get_quant(avctx, c, avctx->extradata, avctx->extradata_size);
ff_dsputil_init(&c->dsp, avctx);
if (codec_reinit(avctx, avctx->width, avctx->height, -1) < 0)
return 1;
return 0;
}
static av_cold int mp_decode_init(AVCodecContext *avctx)
{
MotionPixelsContext *mp = avctx->priv_data;
int w4 = (avctx->width + 3) & ~3;
int h4 = (avctx->height + 3) & ~3;
motionpixels_tableinit();
mp->avctx = avctx;
ff_dsputil_init(&mp->dsp, avctx);
mp->changes_map = av_mallocz(avctx->width * h4);
mp->offset_bits_len = av_log2(avctx->width * avctx->height) + 1;
mp->vpt = av_mallocz(avctx->height * sizeof(YuvPixel));
mp->hpt = av_mallocz(h4 * w4 / 16 * sizeof(YuvPixel));
avctx->pix_fmt = PIX_FMT_RGB555;
return 0;
}
av_cold void ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
int flip, int has_alpha)
{
int i;
s->avctx = avctx;
avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
ff_dsputil_init(&s->dsp, avctx);
ff_videodsp_init(&s->vdsp, 8);
ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id);
ff_init_scantable_permutation(s->dsp.idct_permutation, s->vp3dsp.idct_perm);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct);
for (i=0; i<4; i++) {
s->framep[i] = &s->frames[i];
avcodec_get_frame_defaults(&s->frames[i]);
}
s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN];
s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2];
s->edge_emu_buffer_alloc = NULL;
s->above_blocks = NULL;
s->macroblocks = NULL;
s->quantizer = -1;
s->deblock_filtering = 1;
s->golden_frame = 0;
s->filter = NULL;
s->has_alpha = has_alpha;
s->modelp = &s->model;
if (flip) {
s->flip = -1;
s->frbi = 2;
s->srbi = 0;
} else {
s->flip = 1;
s->frbi = 0;
s->srbi = 2;
}
}
static av_cold int decode_init(AVCodecContext *avctx)
{
ProresContext *ctx = avctx->priv_data;
uint8_t idct_permutation[64];
avctx->bits_per_raw_sample = 10;
ff_dsputil_init(&ctx->dsp, avctx);
ff_proresdsp_init(&ctx->prodsp, avctx);
ff_init_scantable_permutation(idct_permutation,
ctx->prodsp.idct_permutation_type);
permute(ctx->progressive_scan, ff_prores_progressive_scan, idct_permutation);
permute(ctx->interlaced_scan, ff_prores_interlaced_scan, idct_permutation);
return 0;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
MadContext *s = avctx->priv_data;
s->avctx = avctx;
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
ff_blockdsp_init(&s->bdsp, avctx);
ff_bswapdsp_init(&s->bbdsp);
ff_dsputil_init(&s->dsp, avctx);
ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
ff_mpeg12_init_vlcs();
s->last_frame = av_frame_alloc();
if (!s->last_frame)
return AVERROR(ENOMEM);
return 0;
}
static av_cold int dsp_init(AVCodecContext *avctx, AACEncContext *s)
{
int ret = 0;
ff_dsputil_init(&s->dsp, avctx);
// window init
ff_kbd_window_init(ff_aac_kbd_long_1024, 4.0, 1024);
ff_kbd_window_init(ff_aac_kbd_short_128, 6.0, 128);
ff_init_ff_sine_windows(10);
ff_init_ff_sine_windows(7);
if (ret = ff_mdct_init(&s->mdct1024, 11, 0, 32768.0))
return ret;
if (ret = ff_mdct_init(&s->mdct128, 8, 0, 32768.0))
return ret;
return 0;
}
void init_common(AVCodecContext *avctx, MscCodecContext *mscContext) {
ff_dsputil_init(&mscContext->dsp, avctx);
mscContext->mb_width = (avctx->width + 15) / 16;
mscContext->mb_height = (avctx->height + 15) / 16;
initialize_model(&mscContext->arithModelIndexCodingModel, 4);
initialize_model(&mscContext->lastZeroCodingModel, 6);
/*
* Initialize arithmetic coder models. First model: arithModels[0],
* can store 0, 1 values (2^1). Second one arithModels[1], 0, 1, 2, 3
* (2^2) and so on.
*/
for (int i = 0; i < 10; ++i) {
initialize_model(&mscContext->arithModels[i], i + 1);
mscContext->arithModelAddValue[i] = pow(2, i) - 1;
}
mscContext->referenceFrame = avcodec_alloc_frame();
if (!mscContext->referenceFrame) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
}
}
static av_cold int decode_init(AVCodecContext * avctx) {
NellyMoserDecodeContext *s = avctx->priv_data;
s->avctx = avctx;
s->imdct_out = s->imdct_buf[0];
s->imdct_prev = s->imdct_buf[1];
av_lfg_init(&s->random_state, 0);
ff_mdct_init(&s->imdct_ctx, 8, 1, 1.0);
ff_dsputil_init(&s->dsp, avctx);
if (avctx->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
s->scale_bias = 1.0/(32768*8);
avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
} else {
s->scale_bias = 1.0/(1*8);
avctx->sample_fmt = AV_SAMPLE_FMT_S16;
ff_fmt_convert_init(&s->fmt_conv, avctx);
s->float_buf = av_mallocz(NELLY_SAMPLES * sizeof(*s->float_buf));
if (!s->float_buf) {
av_log(avctx, AV_LOG_ERROR, "error allocating float buffer\n");
return AVERROR(ENOMEM);
}
}
/* Generate overlap window */
if (!ff_sine_128[127])
ff_init_ff_sine_windows(7);
avctx->channel_layout = AV_CH_LAYOUT_MONO;
avcodec_get_frame_defaults(&s->frame);
avctx->coded_frame = &s->frame;
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;
}
/**
* Cook initialization
*
* @param avctx pointer to the AVCodecContext
*/
static av_cold int cook_decode_init(AVCodecContext *avctx)
{
COOKContext *q = avctx->priv_data;
const uint8_t *edata_ptr = avctx->extradata;
const uint8_t *edata_ptr_end = edata_ptr + avctx->extradata_size;
int extradata_size = avctx->extradata_size;
int s = 0;
unsigned int channel_mask = 0;
int samples_per_frame = 0;
int ret;
q->avctx = avctx;
/* Take care of the codec specific extradata. */
if (extradata_size <= 0) {
av_log(avctx, AV_LOG_ERROR, "Necessary extradata missing!\n");
return AVERROR_INVALIDDATA;
}
av_log(avctx, AV_LOG_DEBUG, "codecdata_length=%d\n", avctx->extradata_size);
/* Take data from the AVCodecContext (RM container). */
if (!avctx->channels) {
av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
return AVERROR_INVALIDDATA;
}
/* Initialize RNG. */
av_lfg_init(&q->random_state, 0);
ff_dsputil_init(&q->dsp, avctx);
while (edata_ptr < edata_ptr_end) {
/* 8 for mono, 16 for stereo, ? for multichannel
Swap to right endianness so we don't need to care later on. */
if (extradata_size >= 8) {
q->subpacket[s].cookversion = bytestream_get_be32(&edata_ptr);
samples_per_frame = bytestream_get_be16(&edata_ptr);
q->subpacket[s].subbands = bytestream_get_be16(&edata_ptr);
extradata_size -= 8;
}
if (extradata_size >= 8) {
bytestream_get_be32(&edata_ptr); // Unknown unused
q->subpacket[s].js_subband_start = bytestream_get_be16(&edata_ptr);
q->subpacket[s].js_vlc_bits = bytestream_get_be16(&edata_ptr);
extradata_size -= 8;
}
/* Initialize extradata related variables. */
q->subpacket[s].samples_per_channel = samples_per_frame / avctx->channels;
q->subpacket[s].bits_per_subpacket = avctx->block_align * 8;
/* Initialize default data states. */
q->subpacket[s].log2_numvector_size = 5;
q->subpacket[s].total_subbands = q->subpacket[s].subbands;
q->subpacket[s].num_channels = 1;
/* Initialize version-dependent variables */
av_log(avctx, AV_LOG_DEBUG, "subpacket[%i].cookversion=%x\n", s,
q->subpacket[s].cookversion);
q->subpacket[s].joint_stereo = 0;
switch (q->subpacket[s].cookversion) {
case MONO:
if (avctx->channels != 1) {
av_log_ask_for_sample(avctx, "Container channels != 1.\n");
return AVERROR_PATCHWELCOME;
}
av_log(avctx, AV_LOG_DEBUG, "MONO\n");
break;
case STEREO:
if (avctx->channels != 1) {
q->subpacket[s].bits_per_subpdiv = 1;
q->subpacket[s].num_channels = 2;
}
av_log(avctx, AV_LOG_DEBUG, "STEREO\n");
break;
case JOINT_STEREO:
if (avctx->channels != 2) {
av_log_ask_for_sample(avctx, "Container channels != 2.\n");
return AVERROR_PATCHWELCOME;
}
av_log(avctx, AV_LOG_DEBUG, "JOINT_STEREO\n");
if (avctx->extradata_size >= 16) {
q->subpacket[s].total_subbands = q->subpacket[s].subbands +
q->subpacket[s].js_subband_start;
q->subpacket[s].joint_stereo = 1;
q->subpacket[s].num_channels = 2;
}
if (q->subpacket[s].samples_per_channel > 256) {
q->subpacket[s].log2_numvector_size = 6;
}
if (q->subpacket[s].samples_per_channel > 512) {
q->subpacket[s].log2_numvector_size = 7;
}
break;
case MC_COOK:
av_log(avctx, AV_LOG_DEBUG, "MULTI_CHANNEL\n");
if (extradata_size >= 4)
channel_mask |= q->subpacket[s].channel_mask = bytestream_get_be32(&edata_ptr);
if (av_get_channel_layout_nb_channels(q->subpacket[s].channel_mask) > 1) {
q->subpacket[s].total_subbands = q->subpacket[s].subbands +
q->subpacket[s].js_subband_start;
q->subpacket[s].joint_stereo = 1;
q->subpacket[s].num_channels = 2;
q->subpacket[s].samples_per_channel = samples_per_frame >> 1;
if (q->subpacket[s].samples_per_channel > 256) {
q->subpacket[s].log2_numvector_size = 6;
}
if (q->subpacket[s].samples_per_channel > 512) {
q->subpacket[s].log2_numvector_size = 7;
}
} else
q->subpacket[s].samples_per_channel = samples_per_frame;
break;
default:
av_log_ask_for_sample(avctx, "Unknown Cook version.\n");
return AVERROR_PATCHWELCOME;
}