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

libavcodec/vorbis_enc.c

@@ -52,16 +52,24 @@ typedef struct {
 } codebook_t;
 
 typedef struct {
+    int channels;
+    int sample_rate;
+    int blocksize[2];
+
     int ncodebooks;
     codebook_t * codebooks;
 } venc_context_t;
 
-static inline int ilog(int a) {
+static inline int ilog(unsigned int a) {
     int i;
-    for (i = 0; (a >> i) > 0; i++);
+    for (i = 0; a >> i; i++);
     return i;
 }
 
+static void put_float(PutBitContext * pb, float f) {
+    put_bits(pb, 32, *(uint32_t*)&f);
+}
+
 static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
     int i;
     int ordered = 0;
@@ -71,7 +79,7 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
     put_bits(pb, 24, cb->nentries);
 
     for (i = 1; i < cb->nentries; i++) if (cb->entries[i].len < cb->entries[i-1].len) break;
-    if (i == cb->entires) ordered = 1;
+    if (i == cb->nentries) ordered = 1;
 
     put_bits(pb, 1, ordered);
     if (ordered) {
@@ -79,6 +87,7 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
         put_bits(pb, 5, len);
         i = 0;
         while (i < cb->nentries) {
+            int j;
             for (j = 0; j+i < cb->nentries; j++) if (cb->entries[j+i].len != len) break;
             put_bits(pb, 5, j);
             i += j;
@@ -87,7 +96,7 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
     } else {
         int sparse = 0;
         for (i = 0; i < cb->nentries; i++) if (!cb->entries[i].len) break;
-        if (i != cb->entires) sparse = 1;
+        if (i != cb->nentries) sparse = 1;
         put_bits(pb, 1, sparse);
 
         for (i = 0; i < cb->nentries; i++) {
@@ -111,50 +120,95 @@ static void put_codebook_header(PutBitContext * pb, codebook_t * cb) {
 
         for (i = 1; i < tmp; i++) bits = FFMIN(bits, ilog(cb->quantlist[i]));
 
-        put_float(bc, cb->min);
-        put_float(bc, cb->delta);
+        put_float(pb, cb->min);
+        put_float(pb, cb->delta);
 
-        put_bits(bc, 4, bits - 1);
-        put_bits(bc, 1, seq_p);
+        put_bits(pb, 4, bits - 1);
+        put_bits(pb, 1, cb->seq_p);
 
-        for (i = 0; i < tmp; i++) put_bits(bc, bits, cb->quantlist[i])
+        for (i = 0; i < tmp; i++) put_bits(pb, bits, cb->quantlist[i]);
     }
 }
 
-static void put_main_header(PutBitContext * pb, venc_context_t * venc) {
+static int put_main_header(venc_context_t * venc, uint8_t ** out) {
     int i;
-    put_bits(pb, 8, 5); //magic
-    for (i = 0; "vorbis"[i]; i++) put_bits(pb, 8, "vorbis"[i]);
+    PutBitContext pb;
+    uint8_t buffer[50000] = {0}, * p = buffer;
+    int buffer_len = sizeof buffer;
+    int len, hlens[3];
+
+    // identification header
+    init_put_bits(&pb, p, buffer_len);
+    put_bits(&pb, 8, 1); //magic
+    for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
+    put_bits(&pb, 32, 0); // version
+    put_bits(&pb, 8, venc->channels);
+    put_bits(&pb, 32, venc->sample_rate);
+    put_bits(&pb, 32, 0); // bitrate
+    put_bits(&pb, 32, 0); // bitrate
+    put_bits(&pb, 32, 0); // bitrate
+    put_bits(&pb, 4, venc->blocksize[0]);
+    put_bits(&pb, 4, venc->blocksize[1]);
+    put_bits(&pb, 1, 1); // framing
+
+    flush_put_bits(&pb);
+    hlens[0] = (put_bits_count(&pb) + 7) / 8;
+    buffer_len -= hlens[0];
+    p += hlens[0];
+
+    // comment header
+    init_put_bits(&pb, p, buffer_len);
+    put_bits(&pb, 8, 3); //magic
+    for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
+    put_bits(&pb, 32, 0); // vendor length TODO
+    put_bits(&pb, 32, 0); // amount of comments
+    put_bits(&pb, 1, 1); // framing
+
+    flush_put_bits(&pb);
+    hlens[1] = (put_bits_count(&pb) + 7) / 8;
+    buffer_len -= hlens[1];
+    p += hlens[1];
+
+    // setup header
+    init_put_bits(&pb, p, buffer_len);
+    put_bits(&pb, 8, 5); //magic
+    for (i = 0; "vorbis"[i]; i++) put_bits(&pb, 8, "vorbis"[i]);
+
+    // codebooks
+    put_bits(&pb, 8, venc->ncodebooks - 1);
+    for (i = 0; i < venc->ncodebooks; i++) put_codebook_header(&pb, &venc->codebooks[0]);
+
+
+    flush_put_bits(&pb);
+    hlens[2] = (put_bits_count(&pb) + 7) / 8;
+
+    len = hlens[0] + hlens[1] + hlens[2];
+    p = *out = av_mallocz(64 + len + len/255);
+
+    *p++ = 2;
+    p += av_xiphlacing(p, hlens[0]);
+    p += av_xiphlacing(p, hlens[1]);
+    buffer_len = 0;
+    for (i = 0; i < 3; i++) {
+        memcpy(p, buffer + buffer_len, hlens[i]);
+        p += hlens[i];
+        buffer_len += hlens[i];
+    }
 
-    put_bits(pb, 8, venc->ncodebooks - 1);
-    for (i = 0; i < venc->ncodebooks; i++) put_codebook_header(pb, venc->codebooks[0]);
+    return p - *out;
 }
 
 static int vorbis_encode_init(AVCodecContext * avccontext)
 {
     venc_context_t * venc = avccontext->priv_data;
-    uint8_t *p;
-    unsigned int offset, len;
 
-    avccontext->channels;
-    avccontext->sample_rate;
+    venc->channels = avccontext->channels;
+    venc->sample_rate = avccontext->sample_rate;
+
     //if (avccontext->flags & CODEC_FLAG_QSCALE) avccontext->global_quality / (float)FF_QP2LAMBDA); else avccontext->bit_rate;
     //if(avccontext->cutoff > 0) cfreq = avccontext->cutoff / 1000.0;
 
-    len = header.bytes + header_comm.bytes + header_code.bytes;
-
-    p = avccontext->extradata = av_mallocz(64 + len + len/255);
-    p[0] = 2;
-    offset = 1;
-    offset += av_xiphlacing(&p[offset], header.bytes);
-    offset += av_xiphlacing(&p[offset], header_comm.bytes);
-    memcpy(&p[offset], header.packet, header.bytes);
-    offset += header.bytes;
-    memcpy(&p[offset], header_comm.packet, header_comm.bytes);
-    offset += header_comm.bytes;
-    memcpy(&p[offset], header_code.packet, header_code.bytes);
-    offset += header_code.bytes;
-    avccontext->extradata_size = offset;
+    avccontext->extradata_size = put_main_header(venc, (uint8_t**)&avccontext->extradata);
 
     avccontext->frame_size = VORBIS_FRAME_SIZE;
 
@@ -167,17 +221,15 @@ static int vorbis_encode_init(AVCodecContext * avccontext)
 
 static int vorbis_encode_frame(AVCodecContext * avccontext, unsigned char * packets, int buf_size, void *data)
 {
+#if 0
     venc_context_t * venc = avccontext->priv_data;
     signed short * audio = data;
-    int l, samples = data ? VORBIS_FRAME_SIZE : 0;
-
-
-
-    if (!l) return 0;
+    int samples = data ? VORBIS_FRAME_SIZE : 0;
 
     avccontext->coded_frame->pts = av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
     memcpy(packets, compressed_frame, l);
-    return l;
+#endif
+    return 0;
 }