Give all wrappers for external libraries names starting with lib.

Originally committed as revision 9226 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 383 insertions, 0 deletions

diff --git a/libavcodec/libvorbis.c b/libavcodec/libvorbis.c
new file mode 100644
index 0000000000..b11e3d8af2
--- /dev/null
+++ b/libavcodec/libvorbis.c
@@ -0,0 +1,383 @@
+/*
+ * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/**
+ * @file oggvorbis.c
+ * Ogg Vorbis codec support via libvorbisenc.
+ * @author Mark Hills <mark@pogo.org.uk>
+ */
+
+#include <vorbis/vorbisenc.h>
+
+#include "avcodec.h"
+#include "bytestream.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+#define OGGVORBIS_FRAME_SIZE 64
+
+#define BUFFER_SIZE (1024*64)
+
+typedef struct OggVorbisContext {
+    vorbis_info vi ;
+    vorbis_dsp_state vd ;
+    vorbis_block vb ;
+    uint8_t buffer[BUFFER_SIZE];
+    int buffer_index;
+
+    /* decoder */
+    vorbis_comment vc ;
+    ogg_packet op;
+} OggVorbisContext ;
+
+
+static int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
+    double cfreq;
+
+    if(avccontext->flags & CODEC_FLAG_QSCALE) {
+        /* variable bitrate */
+        if(vorbis_encode_setup_vbr(vi, avccontext->channels,
+                avccontext->sample_rate,
+                avccontext->global_quality / (float)FF_QP2LAMBDA))
+            return -1;
+    } else {
+        /* constant bitrate */
+        if(vorbis_encode_setup_managed(vi, avccontext->channels,
+                avccontext->sample_rate, -1, avccontext->bit_rate, -1))
+            return -1;
+
+#ifdef OGGVORBIS_VBR_BY_ESTIMATE
+        /* variable bitrate by estimate */
+        if(vorbis_encode_ctl(vi, OV_ECTL_RATEMANAGE_AVG, NULL))
+            return -1;
+#endif
+    }
+
+    /* cutoff frequency */
+    if(avccontext->cutoff > 0) {
+        cfreq = avccontext->cutoff / 1000.0;
+        if(vorbis_encode_ctl(vi, OV_ECTL_LOWPASS_SET, &cfreq))
+            return -1;
+    }
+
+    return vorbis_encode_setup_init(vi);
+}
+
+static int oggvorbis_encode_init(AVCodecContext *avccontext) {
+    OggVorbisContext *context = avccontext->priv_data ;
+    ogg_packet header, header_comm, header_code;
+    uint8_t *p;
+    unsigned int offset, len;
+
+    vorbis_info_init(&context->vi) ;
+    if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
+        av_log(avccontext, AV_LOG_ERROR, "oggvorbis_encode_init: init_encoder failed") ;
+        return -1 ;
+    }
+    vorbis_analysis_init(&context->vd, &context->vi) ;
+    vorbis_block_init(&context->vd, &context->vb) ;
+
+    vorbis_comment_init(&context->vc);
+    vorbis_comment_add_tag(&context->vc, "encoder", LIBAVCODEC_IDENT) ;
+
+    vorbis_analysis_headerout(&context->vd, &context->vc, &header,
+                                &header_comm, &header_code);
+
+    len = header.bytes + header_comm.bytes +  header_code.bytes;
+    avccontext->extradata_size= 64 + len + len/255;
+    p = avccontext->extradata= av_mallocz(avccontext->extradata_size);
+    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= av_realloc(avccontext->extradata, avccontext->extradata_size);
+
+/*    vorbis_block_clear(&context->vb);
+    vorbis_dsp_clear(&context->vd);
+    vorbis_info_clear(&context->vi);*/
+    vorbis_comment_clear(&context->vc);
+
+    avccontext->frame_size = OGGVORBIS_FRAME_SIZE ;
+
+    avccontext->coded_frame= avcodec_alloc_frame();
+    avccontext->coded_frame->key_frame= 1;
+
+    return 0 ;
+}
+
+
+static int oggvorbis_encode_frame(AVCodecContext *avccontext,
+                                  unsigned char *packets,
+                           int buf_size, void *data)
+{
+    OggVorbisContext *context = avccontext->priv_data ;
+    float **buffer ;
+    ogg_packet op ;
+    signed short *audio = data ;
+    int l, samples = data ? OGGVORBIS_FRAME_SIZE : 0;
+
+    buffer = vorbis_analysis_buffer(&context->vd, samples) ;
+
+    if(context->vi.channels == 1) {
+        for(l = 0 ; l < samples ; l++)
+            buffer[0][l]=audio[l]/32768.f;
+    } else {
+        for(l = 0 ; l < samples ; l++){
+            buffer[0][l]=audio[l*2]/32768.f;
+            buffer[1][l]=audio[l*2+1]/32768.f;
+        }
+    }
+
+    vorbis_analysis_wrote(&context->vd, samples) ;
+
+    while(vorbis_analysis_blockout(&context->vd, &context->vb) == 1) {
+        vorbis_analysis(&context->vb, NULL);
+        vorbis_bitrate_addblock(&context->vb) ;
+
+        while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
+            /* i'd love to say the following line is a hack, but sadly it's
+             * not, apparently the end of stream decision is in libogg. */
+            if(op.bytes==1)
+                continue;
+            memcpy(context->buffer + context->buffer_index, &op, sizeof(ogg_packet));
+            context->buffer_index += sizeof(ogg_packet);
+            memcpy(context->buffer + context->buffer_index, op.packet, op.bytes);
+            context->buffer_index += op.bytes;
+//            av_log(avccontext, AV_LOG_DEBUG, "e%d / %d\n", context->buffer_index, op.bytes);
+        }
+    }
+
+    l=0;
+    if(context->buffer_index){
+        ogg_packet *op2= (ogg_packet*)context->buffer;
+        op2->packet = context->buffer + sizeof(ogg_packet);
+
+        l=  op2->bytes;
+        avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
+        //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
+
+        memcpy(packets, op2->packet, l);
+        context->buffer_index -= l + sizeof(ogg_packet);
+        memcpy(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
+//        av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
+    }
+
+    return l;
+}
+
+
+static int oggvorbis_encode_close(AVCodecContext *avccontext) {
+    OggVorbisContext *context = avccontext->priv_data ;
+/*  ogg_packet op ; */
+
+    vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
+
+    vorbis_block_clear(&context->vb);
+    vorbis_dsp_clear(&context->vd);
+    vorbis_info_clear(&context->vi);
+
+    av_freep(&avccontext->coded_frame);
+    av_freep(&avccontext->extradata);
+
+    return 0 ;
+}
+
+
+AVCodec libvorbis_encoder = {
+    "libvorbis",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_VORBIS,
+    sizeof(OggVorbisContext),
+    oggvorbis_encode_init,
+    oggvorbis_encode_frame,
+    oggvorbis_encode_close,
+    .capabilities= CODEC_CAP_DELAY,
+} ;
+
+static int oggvorbis_decode_init(AVCodecContext *avccontext) {
+    OggVorbisContext *context = avccontext->priv_data ;
+    uint8_t *p= avccontext->extradata;
+    int i, hsizes[3];
+    unsigned char *headers[3], *extradata = avccontext->extradata;
+
+    vorbis_info_init(&context->vi) ;
+    vorbis_comment_init(&context->vc) ;
+
+    if(! avccontext->extradata_size || ! p) {
+        av_log(avccontext, AV_LOG_ERROR, "vorbis extradata absent\n");
+        return -1;
+    }
+
+    if(p[0] == 0 && p[1] == 30) {
+        for(i = 0; i < 3; i++){
+            hsizes[i] = bytestream_get_be16(&p);
+            headers[i] = p;
+            p += hsizes[i];
+        }
+    } else if(*p == 2) {
+        unsigned int offset = 1;
+        p++;
+        for(i=0; i<2; i++) {
+            hsizes[i] = 0;
+            while((*p == 0xFF) && (offset < avccontext->extradata_size)) {
+                hsizes[i] += 0xFF;
+                offset++;
+                p++;
+            }
+            if(offset >= avccontext->extradata_size - 1) {
+                av_log(avccontext, AV_LOG_ERROR,
+                       "vorbis header sizes damaged\n");
+                return -1;
+            }
+            hsizes[i] += *p;
+            offset++;
+            p++;
+        }
+        hsizes[2] = avccontext->extradata_size - hsizes[0]-hsizes[1]-offset;
+#if 0
+        av_log(avccontext, AV_LOG_DEBUG,
+               "vorbis header sizes: %d, %d, %d, / extradata_len is %d \n",
+               hsizes[0], hsizes[1], hsizes[2], avccontext->extradata_size);
+#endif
+        headers[0] = extradata + offset;
+        headers[1] = extradata + offset + hsizes[0];
+        headers[2] = extradata + offset + hsizes[0] + hsizes[1];
+    } else {
+        av_log(avccontext, AV_LOG_ERROR,
+               "vorbis initial header len is wrong: %d\n", *p);
+        return -1;
+    }
+
+    for(i=0; i<3; i++){
+        context->op.b_o_s= i==0;
+        context->op.bytes = hsizes[i];
+        context->op.packet = headers[i];
+        if(vorbis_synthesis_headerin(&context->vi, &context->vc, &context->op)<0){
+            av_log(avccontext, AV_LOG_ERROR, "%d. vorbis header damaged\n", i+1);
+            return -1;
+        }
+    }
+
+    avccontext->channels = context->vi.channels;
+    avccontext->sample_rate = context->vi.rate;
+    avccontext->time_base= (AVRational){1, avccontext->sample_rate};
+
+    vorbis_synthesis_init(&context->vd, &context->vi);
+    vorbis_block_init(&context->vd, &context->vb);
+
+    return 0 ;
+}
+
+
+static inline int conv(int samples, float **pcm, char *buf, int channels) {
+    int i, j, val ;
+    ogg_int16_t *ptr, *data = (ogg_int16_t*)buf ;
+    float *mono ;
+
+    for(i = 0 ; i < channels ; i++){
+        ptr = &data[i];
+        mono = pcm[i] ;
+
+        for(j = 0 ; j < samples ; j++) {
+
+            val = mono[j] * 32767.f;
+
+            if(val > 32767) val = 32767 ;
+            if(val < -32768) val = -32768 ;
+
+            *ptr = val ;
+            ptr += channels;
+        }
+    }
+
+    return 0 ;
+}
+
+
+static int oggvorbis_decode_frame(AVCodecContext *avccontext,
+                        void *data, int *data_size,
+                        uint8_t *buf, int buf_size)
+{
+    OggVorbisContext *context = avccontext->priv_data ;
+    float **pcm ;
+    ogg_packet *op= &context->op;
+    int samples, total_samples, total_bytes;
+
+    if(!buf_size){
+    //FIXME flush
+        return 0;
+    }
+
+    op->packet = buf;
+    op->bytes  = buf_size;
+
+//    av_log(avccontext, AV_LOG_DEBUG, "%d %d %d %"PRId64" %"PRId64" %d %d\n", op->bytes, op->b_o_s, op->e_o_s, op->granulepos, op->packetno, buf_size, context->vi.rate);
+
+/*    for(i=0; i<op->bytes; i++)
+      av_log(avccontext, AV_LOG_DEBUG, "%02X ", op->packet[i]);
+    av_log(avccontext, AV_LOG_DEBUG, "\n");*/
+
+    if(vorbis_synthesis(&context->vb, op) == 0)
+        vorbis_synthesis_blockin(&context->vd, &context->vb) ;
+
+    total_samples = 0 ;
+    total_bytes = 0 ;
+
+    while((samples = vorbis_synthesis_pcmout(&context->vd, &pcm)) > 0) {
+        conv(samples, pcm, (char*)data + total_bytes, context->vi.channels) ;
+        total_bytes += samples * 2 * context->vi.channels ;
+        total_samples += samples ;
+        vorbis_synthesis_read(&context->vd, samples) ;
+    }
+
+    *data_size = total_bytes ;
+    return buf_size ;
+}
+
+
+static int oggvorbis_decode_close(AVCodecContext *avccontext) {
+    OggVorbisContext *context = avccontext->priv_data ;
+
+    vorbis_info_clear(&context->vi) ;
+    vorbis_comment_clear(&context->vc) ;
+
+    return 0 ;
+}
+
+
+AVCodec libvorbis_decoder = {
+    "libvorbis",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_VORBIS,
+    sizeof(OggVorbisContext),
+    oggvorbis_decode_init,
+    NULL,
+    oggvorbis_decode_close,
+    oggvorbis_decode_frame,
+    .capabilities= CODEC_CAP_DELAY,
+} ;