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Original Commit: r5 | ods15 | 2006-09-16 17:29:04 +0300 (Sat, 16 Sep 2006) | 4 lines
more "surrounding" stuff, main header. some cleanup. actually compiles now! doesn't do anything though Originally committed as revision 6416 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Oded Shimon
parent
0688b89c6d
commit
3112124154
@ -52,16 +52,24 @@ typedef struct {
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} codebook_t;
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typedef struct {
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int channels;
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int sample_rate;
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int blocksize[2];
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int ncodebooks;
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codebook_t * codebooks;
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} venc_context_t;
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static inline int ilog(int a) {
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static inline int ilog(unsigned int a) {
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int i;
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for (i = 0; (a >> i) > 0; i++);
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for (i = 0; a >> i; i++);
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return i;
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}
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static void put_float(PutBitContext * pb, float f) {
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put_bits(pb, 32, *(uint32_t*)&f);
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}
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static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
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int i;
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int ordered = 0;
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@ -71,7 +79,7 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
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put_bits(pb, 24, cb->nentries);
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for (i = 1; i < cb->nentries; i++) if (cb->entries[i].len < cb->entries[i-1].len) break;
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if (i == cb->entires) ordered = 1;
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if (i == cb->nentries) ordered = 1;
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put_bits(pb, 1, ordered);
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if (ordered) {
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@ -79,6 +87,7 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
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put_bits(pb, 5, len);
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i = 0;
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while (i < cb->nentries) {
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int j;
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for (j = 0; j+i < cb->nentries; j++) if (cb->entries[j+i].len != len) break;
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put_bits(pb, 5, j);
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i += j;
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@ -87,7 +96,7 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
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} else {
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int sparse = 0;
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for (i = 0; i < cb->nentries; i++) if (!cb->entries[i].len) break;
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if (i != cb->entires) sparse = 1;
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if (i != cb->nentries) sparse = 1;
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put_bits(pb, 1, sparse);
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for (i = 0; i < cb->nentries; i++) {
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@ -111,50 +120,95 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
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for (i = 1; i < tmp; i++) bits = FFMIN(bits, ilog(cb->quantlist[i]));
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put_float(bc, cb->min);
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put_float(bc, cb->delta);
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put_float(pb, cb->min);
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put_float(pb, cb->delta);
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put_bits(bc, 4, bits - 1);
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put_bits(bc, 1, seq_p);
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put_bits(pb, 4, bits - 1);
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put_bits(pb, 1, cb->seq_p);
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for (i = 0; i < tmp; i++) put_bits(bc, bits, cb->quantlist[i])
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for (i = 0; i < tmp; i++) put_bits(pb, bits, cb->quantlist[i]);
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}
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}
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static void put_main_header(PutBitContext * pb, venc_context_t * venc) {
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static int put_main_header(venc_context_t * venc, uint8_t ** out) {
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int i;
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put_bits(pb, 8, 5); //magic
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for (i = 0; "vorbis"[i]; i++) put_bits(pb, 8, "vorbis"[i]);
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PutBitContext pb;
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uint8_t buffer[50000] = {0}, * p = buffer;
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int buffer_len = sizeof buffer;
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int len, hlens[3];
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put_bits(pb, 8, venc->ncodebooks - 1);
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for (i = 0; i < venc->ncodebooks; i++) put_codebook_header(pb, venc->codebooks[0]);
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// identification header
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init_put_bits(&pb, p, buffer_len);
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put_bits(&pb, 8, 1); //magic
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for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
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put_bits(&pb, 32, 0); // version
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put_bits(&pb, 8, venc->channels);
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put_bits(&pb, 32, venc->sample_rate);
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put_bits(&pb, 32, 0); // bitrate
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put_bits(&pb, 32, 0); // bitrate
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put_bits(&pb, 32, 0); // bitrate
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put_bits(&pb, 4, venc->blocksize[0]);
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put_bits(&pb, 4, venc->blocksize[1]);
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put_bits(&pb, 1, 1); // framing
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flush_put_bits(&pb);
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hlens[0] = (put_bits_count(&pb) + 7) / 8;
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buffer_len -= hlens[0];
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p += hlens[0];
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// comment header
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init_put_bits(&pb, p, buffer_len);
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put_bits(&pb, 8, 3); //magic
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for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
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put_bits(&pb, 32, 0); // vendor length TODO
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put_bits(&pb, 32, 0); // amount of comments
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put_bits(&pb, 1, 1); // framing
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flush_put_bits(&pb);
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hlens[1] = (put_bits_count(&pb) + 7) / 8;
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buffer_len -= hlens[1];
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p += hlens[1];
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// setup header
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init_put_bits(&pb, p, buffer_len);
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put_bits(&pb, 8, 5); //magic
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for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
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// codebooks
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put_bits(&pb, 8, venc->ncodebooks - 1);
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for (i = 0; i < venc->ncodebooks; i++) put_codebook_header(&pb, &venc->codebooks[0]);
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flush_put_bits(&pb);
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hlens[2] = (put_bits_count(&pb) + 7) / 8;
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len = hlens[0] + hlens[1] + hlens[2];
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p = *out = av_mallocz(64 + len + len/255);
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*p++ = 2;
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p += av_xiphlacing(p, hlens[0]);
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p += av_xiphlacing(p, hlens[1]);
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buffer_len = 0;
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for (i = 0; i < 3; i++) {
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memcpy(p, buffer + buffer_len, hlens[i]);
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p += hlens[i];
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buffer_len += hlens[i];
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}
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return p - *out;
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}
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static int vorbis_encode_init(AVCodecContext * avccontext)
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{
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venc_context_t * venc = avccontext->priv_data;
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uint8_t *p;
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unsigned int offset, len;
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avccontext->channels;
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avccontext->sample_rate;
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venc->channels = avccontext->channels;
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venc->sample_rate = avccontext->sample_rate;
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//if (avccontext->flags & CODEC_FLAG_QSCALE) avccontext->global_quality / (float)FF_QP2LAMBDA); else avccontext->bit_rate;
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//if(avccontext->cutoff > 0) cfreq = avccontext->cutoff / 1000.0;
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len = header.bytes + header_comm.bytes + header_code.bytes;
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p = avccontext->extradata = av_mallocz(64 + len + len/255);
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p[0] = 2;
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offset = 1;
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offset += av_xiphlacing(&p[offset], header.bytes);
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offset += av_xiphlacing(&p[offset], header_comm.bytes);
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memcpy(&p[offset], header.packet, header.bytes);
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offset += header.bytes;
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memcpy(&p[offset], header_comm.packet, header_comm.bytes);
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offset += header_comm.bytes;
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memcpy(&p[offset], header_code.packet, header_code.bytes);
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offset += header_code.bytes;
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avccontext->extradata_size = offset;
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avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);
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avccontext->frame_size = VORBIS_FRAME_SIZE;
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@ -167,17 +221,15 @@ static int vorbis_encode_init(AVCodecContext * avccontext)
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static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * packets, int buf_size, void *data)
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{
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#if 0
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venc_context_t * venc = avccontext->priv_data;
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signed short * audio = data;
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int l, samples = data ? VORBIS_FRAME_SIZE : 0;
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if (!l) return 0;
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int samples = data ? VORBIS_FRAME_SIZE : 0;
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avccontext->coded_frame->pts = av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
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memcpy(packets, compressed_frame, l);
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return l;
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#endif
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return 0;
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}
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