diff options
| -rw-r--r-- | src/demuxers/demux_mpgaudio.c | 59 |
1 files changed, 35 insertions, 24 deletions
diff --git a/src/demuxers/demux_mpgaudio.c b/src/demuxers/demux_mpgaudio.c index 82a7dd7ab..56759dd4b 100644 --- a/src/demuxers/demux_mpgaudio.c +++ b/src/demuxers/demux_mpgaudio.c @@ -626,11 +626,12 @@ static int parse_frame_payload(demux_mpgaudio_t *this, * 32-bit MP3 frame header. * return 1 if found, 0 if not found */ -static int sniff_buffer_looks_like_mp3 (uint8_t *buf, int buflen) +static int sniff_buffer_looks_like_mp3 (uint8_t *buf, int buflen, int *version, int *layer) { int offset; mpg_audio_frame_t frame; + *version = *layer = 0; if (buf == NULL) return 0; @@ -639,20 +640,21 @@ static int sniff_buffer_looks_like_mp3 (uint8_t *buf, int buflen) if (parse_frame_header(&frame, buf + offset)) { size_t size = frame.size; - /* Since one frame is available, is there another frame - * just to be sure this is more likely to be a real MP3 - * buffer? */ - offset += size; - - if (offset + 4 >= buflen) { - return 0; - } + if (size > 0) { + /* Since one frame is available, is there another frame + * just to be sure this is more likely to be a real MP3 + * buffer? */ + if (offset + size + 4 >= buflen) { + return 0; + } - if (parse_frame_header(&frame, buf + offset)) { - lprintf("mpeg audio frame detected\n"); - return 1; + if (parse_frame_header(&frame, buf + offset + size)) { + *version = frame.version_idx + 1; + *layer = frame.layer; + lprintf("frame detected, mpeg %d layer %d\n", *version, *layer); + return 1; + } } - break; } } return 0; @@ -806,11 +808,13 @@ static int demux_mpgaudio_read_head(input_plugin_t *input, uint8_t *buf) { * mp3 stream detection * return 1 if detected, 0 otherwise */ -static int detect_mpgaudio_file(input_plugin_t *input) { +static int detect_mpgaudio_file(input_plugin_t *input, + int *version, int *layer) { uint8_t buf[MAX_PREVIEW_SIZE]; int preview_len; uint32_t head; + *version = *layer = 0; preview_len = demux_mpgaudio_read_head(input, buf); if (preview_len < 4) return 0; @@ -837,7 +841,7 @@ static int detect_mpgaudio_file(input_plugin_t *input) { lprintf("cannot read mp3 frame header\n"); return 0; } - if (!sniff_buffer_looks_like_mp3(&buf[10 + tag_size], preview_len - 10 - tag_size)) { + if (!sniff_buffer_looks_like_mp3(&buf[10 + tag_size], preview_len - 10 - tag_size, version, layer)) { lprintf ("sniff_buffer_looks_like_mp3 failed\n"); return 0; } else { @@ -845,7 +849,7 @@ static int detect_mpgaudio_file(input_plugin_t *input) { } } else if (head == MPEG_MARKER) { return 0; - } else if (!sniff_buffer_looks_like_mp3(buf, preview_len)) { + } else if (!sniff_buffer_looks_like_mp3(buf, preview_len, version, layer)) { lprintf ("sniff_buffer_looks_like_mp3 failed\n"); return 0; } @@ -1112,13 +1116,15 @@ static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *str input_plugin_t *input) { demux_mpgaudio_t *this; + int version = 0; + int layer = 0; lprintf("trying to open %s...\n", input->get_mrl(input)); switch (stream->content_detection_method) { case METHOD_BY_CONTENT: { - if (!detect_mpgaudio_file(input)) + if (!detect_mpgaudio_file(input, &version, &layer)) return NULL; } break; @@ -1141,7 +1147,7 @@ static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *str default: return NULL; } - + this = xine_xmalloc (sizeof (demux_mpgaudio_t)); this->demux_plugin.send_headers = demux_mpgaudio_send_headers; @@ -1153,12 +1159,17 @@ static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *str this->demux_plugin.get_capabilities = demux_mpgaudio_get_capabilities; this->demux_plugin.get_optional_data = demux_mpgaudio_get_optional_data; this->demux_plugin.demux_class = class_gen; - - this->input = input; - this->audio_fifo = stream->audio_fifo; - this->status = DEMUX_FINISHED; - this->stream = stream; - + + this->input = input; + this->audio_fifo = stream->audio_fifo; + this->status = DEMUX_FINISHED; + this->stream = stream; + + this->mpg_version = version; + this->mpg_layer = layer; + if (version || layer) { + this->valid_frames = NUM_VALID_FRAMES; + } return &this->demux_plugin; } |