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Diffstat (limited to 'src/demuxers/demux_realaudio.c')
-rw-r--r--src/demuxers/demux_realaudio.c114
1 files changed, 105 insertions, 9 deletions
diff --git a/src/demuxers/demux_realaudio.c b/src/demuxers/demux_realaudio.c
index b663912b8..2075f1b6f 100644
--- a/src/demuxers/demux_realaudio.c
+++ b/src/demuxers/demux_realaudio.c
@@ -62,6 +62,10 @@ typedef struct {
off_t data_start;
off_t data_size;
+ int sps, cfs, w, h;
+ int frame_size;
+ uint8_t *frame_buffer;
+
unsigned char *header;
unsigned int header_size;
} demux_ra_t;
@@ -70,6 +74,16 @@ typedef struct {
demux_class_t demux_class;
} demux_ra_class_t;
+static const unsigned char sipr_swaps[38][2]={
+ {0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68},
+ {13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46},
+ {25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56},
+ {42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83},
+ {77,80}};
+
+/* Map flavour to bytes per second */
+static int sipr_fl2bps[4] = {813, 1062, 625, 2000}; // 6.5, 8.5, 5, 16 kbit per second
+
/* returns 1 if the RealAudio file was opened successfully, 0 otherwise */
static int open_ra_file(demux_ra_t *this) {
unsigned char file_header[RA_FILE_HEADER_PREV_SIZE], len;
@@ -165,20 +179,41 @@ static int open_ra_file(demux_ra_t *this) {
offset++;
/* Fourcc for version 3 comes after meta info */
- if((version == 3) && ((offset+7) <= this->header_size)) {
- if(this->header[offset+2] == 4)
- this->fourcc = _X_ME_32(&this->header[offset+3]);
- else {
- xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG,
- "demux_realaudio: invalid fourcc size %d\n", this->header[offset+2]);
- free(this->header);
- return 0;
+ if(version == 3) {
+ if (((offset+7) <= this->header_size)) {
+ if(this->header[offset+2] == 4)
+ this->fourcc = _X_ME_32(&this->header[offset+3]);
+ else {
+ xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG,
+ "demux_realaudio: invalid fourcc size %d\n", this->header[offset+2]);
+ free(this->header);
+ return 0;
+ }
+ } else {
+ this->fourcc = ME_FOURCC('l', 'p', 'c', 'J');
}
}
_x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_FOURCC, this->fourcc);
this->audio_type = _x_formattag_to_buf_audio(this->fourcc);
+ if (version == 4) {
+ this->sps = _X_BE_16 (this->header+44);
+ this->w = _X_BE_16 (this->header+42);
+ this->h = _X_BE_16 (this->header+40);
+ this->cfs = _X_BE_32 (this->header+24);
+ if (this->sps) {
+ this->frame_size = this->sps * this->h * this->sps;
+ this->frame_buffer = xine_xmalloc (this->frame_size);
+ } else {
+ this->frame_size = this->w * this->h;
+ this->frame_buffer = xine_xmalloc (this->frame_size);
+ }
+
+ if (this->audio_type == BUF_AUDIO_28_8 || this->audio_type == BUF_AUDIO_SIPRO)
+ this->block_align = this->cfs;
+ }
+
/* seek to start of data */
this->data_start = this->header_size;
if (this->input->seek(this->input, this->data_start, SEEK_SET) !=
@@ -212,7 +247,65 @@ static int demux_ra_send_chunk(demux_plugin_t *this_gen) {
this->seek_flag = 0;
}
- if(_x_demux_read_send_data(this->audio_fifo, this->input, this->block_align,
+ if (this->audio_type == BUF_AUDIO_28_8 || this->audio_type == BUF_AUDIO_SIPRO) {
+ int x;
+ uint8_t * buffer;
+
+ buffer = this->frame_buffer;
+ if (this->audio_type == BUF_AUDIO_SIPRO) {
+ int n;
+ int len = this->h * this->w;
+ int bs = len * 2 / 96; /* nibbles per subpacket */
+ if(this->input->read(this->input, this->frame_buffer, len) < len) {
+ xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG,
+ "demux_realaudio: failed to read audio chunk\n");
+
+ this->status = DEMUX_FINISHED;
+ return this->status;
+ }
+ /* Perform reordering */
+ for(n = 0; n < 38; n++) {
+ int j;
+ int i = bs * sipr_swaps[n][0];
+ int o = bs * sipr_swaps[n][1];
+ /* swap nibbles of block 'i' with 'o' TODO: optimize */
+ for(j = 0; j < bs; j++) {
+ int x = (i & 1) ? (this->frame_buffer[i >> 1] >> 4) : (this->frame_buffer[i >> 1] & 0x0F);
+ int y = (o & 1) ? (this->frame_buffer[o >> 1] >> 4) : (this->frame_buffer[o >> 1] & 0x0F);
+ if(o & 1)
+ this->frame_buffer[o >> 1] = (this->frame_buffer[o >> 1] & 0x0F) | (x << 4);
+ else
+ this->frame_buffer[o >> 1] = (this->frame_buffer[o >> 1] & 0xF0) | x;
+ if(i & 1)
+ this->frame_buffer[i >> 1] = (this->frame_buffer[i >> 1] & 0x0F) | (y << 4);
+ else
+ this->frame_buffer[i >> 1] = (this->frame_buffer[i >> 1] & 0xF0) | y;
+ ++i; ++o;
+ }
+ }
+ } else {
+ int x, y;
+ int pos;
+
+ for (y = 0; y < this->h; y++)
+ for (x = 0; x < this->h / 2; x++) {
+ pos = x * 2 * this->w + y * this->cfs;
+ if(this->input->read(this->input, this->frame_buffer + pos,
+ this->cfs) < this->cfs) {
+ xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG,
+ "demux_realaudio: failed to read audio chunk\n");
+
+ this->status = DEMUX_FINISHED;
+ return this->status;
+ }
+ }
+ }
+
+ _x_demux_send_data(this->audio_fifo,
+ buffer, this->frame_size,
+ current_pts, this->audio_type, 0,
+ current_normpos, current_pts / 90, 0, 0);
+ } else if(_x_demux_read_send_data(this->audio_fifo, this->input, this->block_align,
current_pts, this->audio_type, 0, current_normpos,
current_pts / 90, 0, 0) < 0) {
this->status = DEMUX_FINISHED;
@@ -299,6 +392,8 @@ static void demux_ra_dispose (demux_plugin_t *this_gen) {
if(this->header)
free(this->header);
+ if (this->frame_buffer)
+ free(this->frame_buffer);
free(this);
}
@@ -333,6 +428,7 @@ static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *str
this = xine_xmalloc (sizeof (demux_ra_t));
this->stream = stream;
this->input = input;
+ this->frame_buffer = NULL;
this->demux_plugin.send_headers = demux_ra_send_headers;
this->demux_plugin.send_chunk = demux_ra_send_chunk;
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-25 15:52:11 +0000