#include "avformat.h"
#include "oggvorbis.h"
+#define DECODER_BUFFER_SIZE 4096
+
typedef struct OggContext {
+ /* output */
ogg_stream_state os ;
- int header_written ;
+ int header_handled ;
ogg_int64_t base_packet_no ;
ogg_int64_t base_granule_pos ;
+
+ /* input */
+ ogg_sync_state oy ;
} OggContext ;
ogg_packet header, header_comm, header_code ;
int n ;
- fprintf(stderr, "ogg_write_header\n") ;
-
if(!(context = malloc(sizeof(OggContext))))
return -1 ;
avfcontext->priv_data = context ;
/* end of vorbis specific code */
- context->header_written = 0 ;
+ context->header_handled = 0 ;
context->base_packet_no = 0 ;
}
/* flush header packets so audio starts on a new page */
- if(!context->header_written) {
+ if(!context->header_handled) {
while(ogg_stream_flush(&context->os, &og)) {
put_buffer(&avfcontext->pb, og.header, og.header_len) ;
put_buffer(&avfcontext->pb, og.body, og.body_len) ;
put_flush_packet(&avfcontext->pb);
}
- context->header_written = 1 ;
+ context->header_handled = 1 ;
}
while(l < size) {
OggContext *context = avfcontext->priv_data ;
ogg_page og ;
- fprintf(stderr, "ogg_write_trailer\n") ;
-
while(ogg_stream_flush(&context->os, &og)) {
put_buffer(&avfcontext->pb, og.header, og.header_len) ;
put_buffer(&avfcontext->pb, og.body, og.body_len) ;
ogg_write_header,
ogg_write_packet,
ogg_write_trailer,
-};
+} ;
+
+
+static int next_packet(AVFormatContext *avfcontext, ogg_packet *op) {
+ OggContext *context = avfcontext->priv_data ;
+ ogg_page og ;
+ char *buf ;
+
+ while(ogg_stream_packetout(&context->os, op) != 1) {
+
+ /* while no pages are available, read in more data to the sync */
+ while(ogg_sync_pageout(&context->oy, &og) != 1) {
+ buf = ogg_sync_buffer(&context->oy, DECODER_BUFFER_SIZE) ;
+ if(get_buffer(&avfcontext->pb, buf, DECODER_BUFFER_SIZE) <= 0)
+ return 1 ;
+ ogg_sync_wrote(&context->oy, DECODER_BUFFER_SIZE) ;
+ }
+
+ /* got a page. Feed it into the stream and get the packet */
+ if(ogg_stream_pagein(&context->os, &og) != 0)
+ return 1 ;
+ }
+
+ return 0 ;
+}
+
+
+static int ogg_read_header(AVFormatContext *avfcontext, AVFormatParameters *ap)
+{
+ OggContext *context ;
+ char *buf ;
+ ogg_page og ;
+ AVStream *ast ;
+
+ if(!(context = malloc(sizeof(OggContext)))) {
+ perror("malloc") ;
+ return -1 ;
+ }
+ avfcontext->priv_data = context ;
+
+ ogg_sync_init(&context->oy) ;
+ buf = ogg_sync_buffer(&context->oy, DECODER_BUFFER_SIZE) ;
+
+ if(get_buffer(&avfcontext->pb, buf, DECODER_BUFFER_SIZE) <= 0)
+ return -EIO ;
+
+ ogg_sync_wrote(&context->oy, DECODER_BUFFER_SIZE) ;
+ ogg_sync_pageout(&context->oy, &og) ;
+ ogg_stream_init(&context->os, ogg_page_serialno(&og)) ;
+ ogg_stream_pagein(&context->os, &og) ;
+
+ /* currently only one vorbis stream supported */
+
+ ast = av_new_stream(avfcontext, 0) ;
+ if(!ast)
+ return AVERROR_NOMEM ;
+
+ ast->codec.codec_type = CODEC_TYPE_AUDIO ;
+ ast->codec.codec_id = CODEC_ID_VORBIS ;
+
+ return 0 ;
+}
+
+
+static int ogg_read_packet(AVFormatContext *avfcontext, AVPacket *pkt) {
+ ogg_packet op ;
+
+ if(next_packet(avfcontext, &op))
+ return -EIO ;
+ if(av_new_packet(pkt, sizeof(ogg_packet) + op.bytes) < 0)
+ return -EIO ;
+ pkt->stream_index = 0 ;
+ memcpy(pkt->data, &op, sizeof(ogg_packet)) ;
+ memcpy(pkt->data + sizeof(ogg_packet), op.packet, op.bytes) ;
+
+ return sizeof(ogg_packet) + op.bytes ;
+}
+
+
+static int ogg_read_close(AVFormatContext *avfcontext) {
+ OggContext *context = avfcontext->priv_data ;
+
+ ogg_stream_clear(&context->os) ;
+ ogg_sync_clear(&context->oy) ;
+
+ return 0 ;
+}
+
+
+static AVInputFormat ogg_iformat = {
+ "ogg",
+ "Ogg Vorbis",
+ sizeof(OggContext),
+ NULL,
+ ogg_read_header,
+ ogg_read_packet,
+ ogg_read_close,
+ .extensions = "ogg",
+} ;
int ogg_init(void) {
av_register_output_format(&ogg_oformat) ;
+ av_register_input_format(&ogg_iformat);
return 0 ;
}
vorbis_info vi ;
vorbis_dsp_state vd ;
vorbis_block vb ;
+
+ /* decoder */
+ vorbis_comment vc ;
} OggVorbisContext ;
int oggvorbis_init_encoder(vorbis_info *vi, AVCodecContext *avccontext) {
- if(avccontext->quality) { /* VBR requested */
-
- fprintf(stderr, "init_encode: channels=%d quality=%d\n",
- avccontext->channels, avccontext->quality) ;
-
+ if(avccontext->quality) /* VBR requested */
return vorbis_encode_init_vbr(vi, avccontext->channels,
avccontext->sample_rate, (float)avccontext->quality / 1000) ;
- }
-
- fprintf(stderr, "init_encoder: channels=%d bitrate=%d tolerance=%d\n",
- avccontext->channels, avccontext->bit_rate,
- avccontext->bit_rate_tolerance) ;
return vorbis_encode_init(vi, avccontext->channels,
avccontext->sample_rate, -1, avccontext->bit_rate, -1) ;
static int oggvorbis_encode_init(AVCodecContext *avccontext) {
OggVorbisContext *context = avccontext->priv_data ;
- fprintf(stderr, "oggvorbis_encode_init\n") ;
-
vorbis_info_init(&context->vi) ;
-
if(oggvorbis_init_encoder(&context->vi, avccontext) < 0) {
fprintf(stderr, "oggvorbis_encode_init: init_encoder failed") ;
return -1 ;
}
-
vorbis_analysis_init(&context->vd, &context->vi) ;
vorbis_block_init(&context->vd, &context->vb) ;
}
-int oggvorbis_encode_frame(AVCodecContext *avccontext, unsigned char *packets,
+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 char *audio = data ;
- int l, samples = buf_size / 16 ; /* samples = OGGVORBIS_FRAME_SIZE */ ;
+ int l, samples = OGGVORBIS_FRAME_SIZE ;
buffer = vorbis_analysis_buffer(&context->vd, samples) ;
}
-int oggvorbis_encode_close(AVCodecContext *avccontext) {
+static int oggvorbis_encode_close(AVCodecContext *avccontext) {
OggVorbisContext *context = avccontext->priv_data ;
/* ogg_packet op ; */
- fprintf(stderr, "oggvorbis_encode_close\n") ;
-
vorbis_analysis_wrote(&context->vd, 0) ; /* notify vorbisenc this is EOF */
/* We need to write all the remaining packets into the stream
* on closing */
+ fprintf(stderr, "fixme: not all packets written on oggvorbis_encode_close()\n") ;
+
/*
while(vorbis_bitrate_flushpacket(&context->vd, &op)) {
memcpy(packets + l, &op, sizeof(ogg_packet)) ;
oggvorbis_encode_init,
oggvorbis_encode_frame,
oggvorbis_encode_close
-};
+} ;
+
+
+static int oggvorbis_decode_init(AVCodecContext *avccontext) {
+ OggVorbisContext *context = avccontext->priv_data ;
+
+ vorbis_info_init(&context->vi) ;
+ vorbis_comment_init(&context->vc) ;
+
+ 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 *buf, int buf_size)
+{
+ OggVorbisContext *context = avccontext->priv_data ;
+ ogg_packet *op = (ogg_packet*)buf ;
+ float **pcm ;
+ int samples, total_samples, total_bytes ;
+
+ op->packet = (char*)op + sizeof(ogg_packet) ; /* correct data pointer */
+
+ if(op->packetno < 3) {
+ vorbis_synthesis_headerin(&context->vi, &context->vc, op) ;
+ return buf_size ;
+ }
+
+ if(op->packetno == 3) {
+ fprintf(stderr, "vorbis_decode: %d channel, %ldHz, encoder `%s'\n",
+ context->vi.channels, context->vi.rate, context->vc.vendor);
+ avccontext->channels = context->vi.channels ;
+ avccontext->sample_rate = context->vi.rate ;
+
+ vorbis_synthesis_init(&context->vd, &context->vi) ;
+ vorbis_block_init(&context->vd, &context->vb);
+ }
+
+ 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 oggvorbis_decoder = {
+ "vorbis",
+ CODEC_TYPE_AUDIO,
+ CODEC_ID_VORBIS,
+ sizeof(OggVorbisContext),
+ oggvorbis_decode_init,
+ NULL,
+ oggvorbis_decode_close,
+ oggvorbis_decode_frame,
+} ;
projects / platform / upstream / libav.git / commitdiff