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https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
make some more functions global so they can be shared with vorbis_enc.c
Originally committed as revision 6402 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Oded Shimon
parent
9f963af5a0
commit
6c29d7c8f3
@ -160,12 +160,10 @@ typedef struct vorbis_context_s {
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/* Helper functions */
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#define ilog(i) av_log2(2*(i))
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#define BARK(x) \
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(13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
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static unsigned int nth_root(unsigned int x, unsigned int n) { // x^(1/n)
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unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n)
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unsigned int ret=0, i, j;
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do {
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@ -186,7 +184,7 @@ static float vorbisfloat2float(uint_fast32_t val) {
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// Generate vlc codes from vorbis huffman code lengths
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static int vorbis_len2vlc(vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t *codes, uint_fast32_t num) {
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int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
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uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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@ -209,12 +207,12 @@ static int vorbis_len2vlc(vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t
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}
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#ifdef V_DEBUG
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av_log(vc->avccontext, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
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av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
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init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
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for(i=0;i<bits[p];++i) {
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av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
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av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
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}
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av_log(vc->avccontext, AV_LOG_INFO, "\n");
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av_log(NULL, AV_LOG_INFO, "\n");
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#endif
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++p;
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@ -235,17 +233,19 @@ static int vorbis_len2vlc(vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t
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codes[p]=code;
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#ifdef V_DEBUG
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av_log(vc->avccontext, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
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av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
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init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
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for(i=0;i<bits[p];++i) {
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av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
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av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
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}
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av_log(vc->avccontext, AV_LOG_INFO, "\n");
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av_log(NULL, AV_LOG_INFO, "\n");
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#endif
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}
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//FIXME no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
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//no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
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for (p=1; p<33; p++)
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if (exit_at_level[p]) return 1;
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return 0;
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}
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@ -336,8 +336,8 @@ static void vorbis_free(vorbis_context *vc) {
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static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
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uint_fast16_t cb;
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uint_fast8_t *tmp_vlc_bits;
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uint_fast32_t *tmp_vlc_codes;
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uint8_t *tmp_vlc_bits;
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uint32_t *tmp_vlc_codes;
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GetBitContext *gb=&vc->gb;
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vc->codebook_count=get_bits(gb,8)+1;
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@ -345,8 +345,8 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
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AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
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vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
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tmp_vlc_bits=(uint_fast8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast8_t));
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tmp_vlc_codes=(uint_fast32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast32_t));
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tmp_vlc_bits=(uint8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
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tmp_vlc_codes=(uint32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
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for(cb=0;cb<vc->codebook_count;++cb) {
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vorbis_codebook *codebook_setup=&vc->codebooks[cb];
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@ -439,7 +439,7 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
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if (codebook_setup->lookup_type==1) {
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uint_fast16_t i, j, k;
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uint_fast16_t codebook_lookup_values=nth_root(entries, codebook_setup->dimensions);
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uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
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uint_fast16_t codebook_multiplicands[codebook_lookup_values];
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float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
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@ -503,7 +503,7 @@ static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
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}
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// Initialize VLC table
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if (vorbis_len2vlc(vc, tmp_vlc_bits, tmp_vlc_codes, entries)) {
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if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
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av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
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goto error;
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}
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@ -1363,59 +1363,10 @@ static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *
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AV_DEBUG(" Looking at post %d \n", i);
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if (floor1_flag[vf->list[i].sort]) { // SPEC mispelled
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int_fast16_t x, y, dy, base, sy; // if uncommented: dy = -32 adx = 2 base = 2blablabla ?????
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hy=floor1_Y_final[vf->list[i].sort]*vf->multiplier;
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hx=vf->list[vf->list[i].sort].x;
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dy=hy-ly;
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adx=hx-lx;
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ady= (dy<0) ? -dy:dy;//ABS(dy);
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base=(int16_t)dy/(int16_t)adx;
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AV_DEBUG(" dy %d adx %d base %d = %d \n", dy, adx, base, dy/adx);
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x=lx;
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y=ly;
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err=0;
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if (dy<0) {
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sy=base-1;
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} else {
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sy=base+1;
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}
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ady=ady-(base<0 ? -base : base)*adx;
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vec[x]=ff_vorbis_floor1_inverse_db_table[y];
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AV_DEBUG(" vec[ %d ] = %d \n", x, y);
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for(x=lx+1;(x<hx) && (x<vf->list[1].x);++x) {
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err+=ady;
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if (err>=adx) {
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err-=adx;
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y+=sy;
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} else {
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y+=base;
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}
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vec[x]=ff_vorbis_floor1_inverse_db_table[y];
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AV_DEBUG(" vec[ %d ] = %d \n", x, y);
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}
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/* for(j=1;j<hx-lx+1;++j) { // iterating render_point
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dy=hy-ly;
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adx=hx-lx;
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ady= dy<0 ? -dy : dy;
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err=ady*j;
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off=err/adx;
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if (dy<0) {
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predicted=ly-off;
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} else {
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predicted=ly+off;
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}
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if (lx+j < vf->x_list[1]) {
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vec[lx+j]=ff_vorbis_floor1_inverse_db_table[predicted];
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}
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}*/
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render_line(lx, ly, hx, hy, vec, vc->blocksize[1]);
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lx=hx;
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ly=hy;
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@ -1423,9 +1374,7 @@ static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *
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}
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if (hx<vf->list[1].x) {
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for(i=hx;i<vf->list[1].x;++i) {
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vec[i]=ff_vorbis_floor1_inverse_db_table[hy];
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}
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render_line(hx, hy, vf->list[1].x, hy, vec, vc->blocksize[1]);
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}
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AV_DEBUG(" Floor decoded\n");
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@ -30,5 +30,36 @@ typedef struct {
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} floor1_entry_t;
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void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values);
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unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n)
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int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num);
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static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
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int dy = y1 - y0;
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int adx = x1 - x0;
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int ady = ABS(dy);
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int base = dy / adx;
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int x = x0;
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int y = y0;
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int err = 0;
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int sy;
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if (dy < 0) sy = base - 1;
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else sy = base + 1;
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ady = ady - ABS(base) * adx;
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if (x >= n) return;
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buf[x] = ff_vorbis_floor1_inverse_db_table[y];
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for (x = x0 + 1; x < x1; x++) {
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if (x >= n) return;
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err += ady;
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if (err >= adx) {
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err -= adx;
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y += sy;
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} else {
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y += base;
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}
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buf[x] = ff_vorbis_floor1_inverse_db_table[y];
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}
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}
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#define ilog(i) av_log2(2*(i))
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#endif
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