| /* GStreamer DCA parser |
| * Copyright (C) 2010 Tim-Philipp Müller <tim centricular net> |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public |
| * License along with this library; if not, write to the |
| * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| /** |
| * SECTION:element-dcaparse |
| * @short_description: DCA (DTS Coherent Acoustics) parser |
| * @see_also: #GstAmrParse, #GstAACParse, #GstAc3Parse |
| * |
| * This is a DCA (DTS Coherent Acoustics) parser. |
| * |
| * <refsect2> |
| * <title>Example launch line</title> |
| * |[ |
| * gst-launch-1.0 filesrc location=abc.dts ! dcaparse ! dtsdec ! audioresample ! audioconvert ! autoaudiosink |
| * ]| |
| * </refsect2> |
| */ |
| |
| /* TODO: |
| * - should accept framed and unframed input (needs decodebin fixes first) |
| * - seeking in raw .dts files doesn't seem to work, but duration estimate ok |
| * |
| * - if frames have 'odd' durations, the frame durations (plus timestamps) |
| * aren't adjusted up occasionally to make up for rounding error gaps. |
| * (e.g. if 512 samples per frame @ 48kHz = 10.666666667 ms/frame) |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <string.h> |
| |
| #include "gstdcaparse.h" |
| #include <gst/base/base.h> |
| #include <gst/pbutils/pbutils.h> |
| |
| GST_DEBUG_CATEGORY_STATIC (dca_parse_debug); |
| #define GST_CAT_DEFAULT dca_parse_debug |
| |
| static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("audio/x-dts," |
| " framed = (boolean) true," |
| " channels = (int) [ 1, 8 ]," |
| " rate = (int) [ 8000, 192000 ]," |
| " depth = (int) { 14, 16 }," |
| " endianness = (int) { LITTLE_ENDIAN, BIG_ENDIAN }, " |
| " block-size = (int) [ 1, MAX], " " frame-size = (int) [ 1, MAX]")); |
| |
| static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("audio/x-dts; " "audio/x-private1-dts")); |
| |
| static void gst_dca_parse_finalize (GObject * object); |
| |
| static gboolean gst_dca_parse_start (GstBaseParse * parse); |
| static gboolean gst_dca_parse_stop (GstBaseParse * parse); |
| static GstFlowReturn gst_dca_parse_handle_frame (GstBaseParse * parse, |
| GstBaseParseFrame * frame, gint * skipsize); |
| static GstFlowReturn gst_dca_parse_pre_push_frame (GstBaseParse * parse, |
| GstBaseParseFrame * frame); |
| static GstCaps *gst_dca_parse_get_sink_caps (GstBaseParse * parse, |
| GstCaps * filter); |
| static gboolean gst_dca_parse_set_sink_caps (GstBaseParse * parse, |
| GstCaps * caps); |
| |
| #define gst_dca_parse_parent_class parent_class |
| G_DEFINE_TYPE (GstDcaParse, gst_dca_parse, GST_TYPE_BASE_PARSE); |
| |
| static void |
| gst_dca_parse_class_init (GstDcaParseClass * klass) |
| { |
| GstBaseParseClass *parse_class = GST_BASE_PARSE_CLASS (klass); |
| GstElementClass *element_class = GST_ELEMENT_CLASS (klass); |
| GObjectClass *object_class = G_OBJECT_CLASS (klass); |
| |
| GST_DEBUG_CATEGORY_INIT (dca_parse_debug, "dcaparse", 0, |
| "DCA audio stream parser"); |
| |
| object_class->finalize = gst_dca_parse_finalize; |
| |
| parse_class->start = GST_DEBUG_FUNCPTR (gst_dca_parse_start); |
| parse_class->stop = GST_DEBUG_FUNCPTR (gst_dca_parse_stop); |
| parse_class->handle_frame = GST_DEBUG_FUNCPTR (gst_dca_parse_handle_frame); |
| parse_class->pre_push_frame = |
| GST_DEBUG_FUNCPTR (gst_dca_parse_pre_push_frame); |
| parse_class->get_sink_caps = GST_DEBUG_FUNCPTR (gst_dca_parse_get_sink_caps); |
| parse_class->set_sink_caps = GST_DEBUG_FUNCPTR (gst_dca_parse_set_sink_caps); |
| |
| gst_element_class_add_static_pad_template (element_class, &sink_template); |
| gst_element_class_add_static_pad_template (element_class, &src_template); |
| |
| gst_element_class_set_static_metadata (element_class, |
| "DTS Coherent Acoustics audio stream parser", "Codec/Parser/Audio", |
| "DCA parser", "Tim-Philipp Müller <tim centricular net>"); |
| } |
| |
| static void |
| gst_dca_parse_reset (GstDcaParse * dcaparse) |
| { |
| dcaparse->channels = -1; |
| dcaparse->rate = -1; |
| dcaparse->depth = -1; |
| dcaparse->endianness = -1; |
| dcaparse->block_size = -1; |
| dcaparse->frame_size = -1; |
| dcaparse->last_sync = 0; |
| dcaparse->sent_codec_tag = FALSE; |
| } |
| |
| static void |
| gst_dca_parse_init (GstDcaParse * dcaparse) |
| { |
| gst_base_parse_set_min_frame_size (GST_BASE_PARSE (dcaparse), |
| DCA_MIN_FRAMESIZE); |
| gst_dca_parse_reset (dcaparse); |
| dcaparse->baseparse_chainfunc = |
| GST_BASE_PARSE_SINK_PAD (GST_BASE_PARSE (dcaparse))->chainfunc; |
| |
| GST_PAD_SET_ACCEPT_INTERSECT (GST_BASE_PARSE_SINK_PAD (dcaparse)); |
| GST_PAD_SET_ACCEPT_TEMPLATE (GST_BASE_PARSE_SINK_PAD (dcaparse)); |
| } |
| |
| static void |
| gst_dca_parse_finalize (GObject * object) |
| { |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static gboolean |
| gst_dca_parse_start (GstBaseParse * parse) |
| { |
| GstDcaParse *dcaparse = GST_DCA_PARSE (parse); |
| |
| GST_DEBUG_OBJECT (parse, "starting"); |
| |
| gst_dca_parse_reset (dcaparse); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_dca_parse_stop (GstBaseParse * parse) |
| { |
| GST_DEBUG_OBJECT (parse, "stopping"); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_dca_parse_parse_header (GstDcaParse * dcaparse, |
| const GstByteReader * reader, guint * frame_size, |
| guint * sample_rate, guint * channels, guint * depth, |
| gint * endianness, guint * num_blocks, guint * samples_per_block, |
| gboolean * terminator) |
| { |
| static const int sample_rates[16] = { 0, 8000, 16000, 32000, 0, 0, 11025, |
| 22050, 44100, 0, 0, 12000, 24000, 48000, 96000, 192000 |
| }; |
| static const guint8 channels_table[16] = { 1, 2, 2, 2, 2, 3, 3, 4, 4, 5, |
| 6, 6, 6, 7, 8, 8 |
| }; |
| GstByteReader r = *reader; |
| guint16 hdr[8]; |
| guint32 marker; |
| guint chans, lfe, i; |
| |
| if (gst_byte_reader_get_remaining (&r) < (4 + sizeof (hdr))) |
| return FALSE; |
| |
| marker = gst_byte_reader_peek_uint32_be_unchecked (&r); |
| |
| /* raw big endian or 14-bit big endian */ |
| if (marker == 0x7FFE8001 || marker == 0x1FFFE800) { |
| for (i = 0; i < G_N_ELEMENTS (hdr); ++i) |
| hdr[i] = gst_byte_reader_get_uint16_be_unchecked (&r); |
| } else |
| /* raw little endian or 14-bit little endian */ |
| if (marker == 0xFE7F0180 || marker == 0xFF1F00E8) { |
| for (i = 0; i < G_N_ELEMENTS (hdr); ++i) |
| hdr[i] = gst_byte_reader_get_uint16_le_unchecked (&r); |
| } else { |
| return FALSE; |
| } |
| |
| GST_LOG_OBJECT (dcaparse, "dts sync marker 0x%08x at offset %u", marker, |
| gst_byte_reader_get_pos (reader)); |
| |
| /* 14-bit mode */ |
| if (marker == 0x1FFFE800 || marker == 0xFF1F00E8) { |
| if ((hdr[2] & 0xFFF0) != 0x07F0) |
| return FALSE; |
| /* discard top 2 bits (2 void), shift in 2 */ |
| hdr[0] = (hdr[0] << 2) | ((hdr[1] >> 12) & 0x0003); |
| /* discard top 4 bits (2 void, 2 shifted into hdr[0]), shift in 4 etc. */ |
| hdr[1] = (hdr[1] << 4) | ((hdr[2] >> 10) & 0x000F); |
| hdr[2] = (hdr[2] << 6) | ((hdr[3] >> 8) & 0x003F); |
| hdr[3] = (hdr[3] << 8) | ((hdr[4] >> 6) & 0x00FF); |
| hdr[4] = (hdr[4] << 10) | ((hdr[5] >> 4) & 0x03FF); |
| hdr[5] = (hdr[5] << 12) | ((hdr[6] >> 2) & 0x0FFF); |
| hdr[6] = (hdr[6] << 14) | ((hdr[7] >> 0) & 0x3FFF); |
| g_assert (hdr[0] == 0x7FFE && hdr[1] == 0x8001); |
| } |
| |
| GST_LOG_OBJECT (dcaparse, "frame header: %04x%04x%04x%04x", |
| hdr[2], hdr[3], hdr[4], hdr[5]); |
| |
| *terminator = (hdr[2] & 0x80) ? FALSE : TRUE; |
| *samples_per_block = ((hdr[2] >> 10) & 0x1f) + 1; |
| *num_blocks = ((hdr[2] >> 2) & 0x7F) + 1; |
| *frame_size = (((hdr[2] & 0x03) << 12) | (hdr[3] >> 4)) + 1; |
| chans = ((hdr[3] & 0x0F) << 2) | (hdr[4] >> 14); |
| *sample_rate = sample_rates[(hdr[4] >> 10) & 0x0F]; |
| lfe = (hdr[5] >> 9) & 0x03; |
| |
| GST_TRACE_OBJECT (dcaparse, "frame size %u, num_blocks %u, rate %u, " |
| "samples per block %u", *frame_size, *num_blocks, *sample_rate, |
| *samples_per_block); |
| |
| if (*num_blocks < 6 || *frame_size < 96 || *sample_rate == 0) |
| return FALSE; |
| |
| if (marker == 0x1FFFE800 || marker == 0xFF1F00E8) |
| *frame_size = (*frame_size * 16) / 14; /* FIXME: round up? */ |
| |
| if (chans < G_N_ELEMENTS (channels_table)) |
| *channels = channels_table[chans] + ((lfe) ? 1 : 0); |
| else |
| return FALSE; |
| |
| if (depth) |
| *depth = (marker == 0x1FFFE800 || marker == 0xFF1F00E8) ? 14 : 16; |
| if (endianness) |
| *endianness = (marker == 0xFE7F0180 || marker == 0xFF1F00E8) ? |
| G_LITTLE_ENDIAN : G_BIG_ENDIAN; |
| |
| GST_TRACE_OBJECT (dcaparse, "frame size %u, channels %u, rate %u, " |
| "num_blocks %u, samples_per_block %u", *frame_size, *channels, |
| *sample_rate, *num_blocks, *samples_per_block); |
| |
| return TRUE; |
| } |
| |
| static gint |
| gst_dca_parse_find_sync (GstDcaParse * dcaparse, GstByteReader * reader, |
| gsize bufsize, guint32 * sync) |
| { |
| guint32 best_sync = 0; |
| guint best_offset = G_MAXUINT; |
| gint off; |
| |
| /* FIXME: verify syncs via _parse_header() here already */ |
| |
| /* Raw little endian */ |
| off = gst_byte_reader_masked_scan_uint32 (reader, 0xffffffff, 0xfe7f0180, |
| 0, bufsize); |
| if (off >= 0 && off < best_offset) { |
| best_offset = off; |
| best_sync = 0xfe7f0180; |
| } |
| |
| /* Raw big endian */ |
| off = gst_byte_reader_masked_scan_uint32 (reader, 0xffffffff, 0x7ffe8001, |
| 0, bufsize); |
| if (off >= 0 && off < best_offset) { |
| best_offset = off; |
| best_sync = 0x7ffe8001; |
| } |
| |
| /* FIXME: check next 2 bytes as well for 14-bit formats (but then don't |
| * forget to adjust the *skipsize= in _check_valid_frame() */ |
| |
| /* 14-bit little endian */ |
| off = gst_byte_reader_masked_scan_uint32 (reader, 0xffffffff, 0xff1f00e8, |
| 0, bufsize); |
| if (off >= 0 && off < best_offset) { |
| best_offset = off; |
| best_sync = 0xff1f00e8; |
| } |
| |
| /* 14-bit big endian */ |
| off = gst_byte_reader_masked_scan_uint32 (reader, 0xffffffff, 0x1fffe800, |
| 0, bufsize); |
| if (off >= 0 && off < best_offset) { |
| best_offset = off; |
| best_sync = 0x1fffe800; |
| } |
| |
| if (best_offset == G_MAXUINT) |
| return -1; |
| |
| *sync = best_sync; |
| return best_offset; |
| } |
| |
| static GstFlowReturn |
| gst_dca_parse_handle_frame (GstBaseParse * parse, |
| GstBaseParseFrame * frame, gint * skipsize) |
| { |
| GstDcaParse *dcaparse = GST_DCA_PARSE (parse); |
| GstBuffer *buf = frame->buffer; |
| GstByteReader r; |
| gboolean parser_in_sync; |
| gboolean terminator; |
| guint32 sync = 0; |
| guint size = 0, rate, chans, num_blocks, samples_per_block, depth; |
| gint block_size; |
| gint endianness; |
| gint off = -1; |
| GstMapInfo map; |
| GstFlowReturn ret = GST_FLOW_EOS; |
| gsize extra_size = 0; |
| |
| gst_buffer_map (buf, &map, GST_MAP_READ); |
| |
| if (G_UNLIKELY (map.size < 16)) { |
| *skipsize = 1; |
| goto cleanup; |
| } |
| |
| parser_in_sync = !GST_BASE_PARSE_LOST_SYNC (parse); |
| |
| gst_byte_reader_init (&r, map.data, map.size); |
| |
| if (G_LIKELY (parser_in_sync && dcaparse->last_sync != 0)) { |
| off = gst_byte_reader_masked_scan_uint32 (&r, 0xffffffff, |
| dcaparse->last_sync, 0, map.size); |
| } |
| |
| if (G_UNLIKELY (off < 0)) { |
| off = gst_dca_parse_find_sync (dcaparse, &r, map.size, &sync); |
| } |
| |
| /* didn't find anything that looks like a sync word, skip */ |
| if (off < 0) { |
| *skipsize = map.size - 3; |
| GST_DEBUG_OBJECT (dcaparse, "no sync, skipping %d bytes", *skipsize); |
| goto cleanup; |
| } |
| |
| GST_LOG_OBJECT (parse, "possible sync %08x at buffer offset %d", sync, off); |
| |
| /* possible frame header, but not at offset 0? skip bytes before sync */ |
| if (off > 0) { |
| *skipsize = off; |
| goto cleanup; |
| } |
| |
| /* make sure the values in the frame header look sane */ |
| if (!gst_dca_parse_parse_header (dcaparse, &r, &size, &rate, &chans, &depth, |
| &endianness, &num_blocks, &samples_per_block, &terminator)) { |
| *skipsize = 4; |
| goto cleanup; |
| } |
| |
| GST_LOG_OBJECT (parse, "got frame, sync %08x, size %u, rate %d, channels %d", |
| sync, size, rate, chans); |
| |
| dcaparse->last_sync = sync; |
| |
| /* FIXME: Don't look for a second syncword, there are streams out there |
| * that consistently contain garbage between every frame so we never ever |
| * find a second consecutive syncword. |
| * See https://bugzilla.gnome.org/show_bug.cgi?id=738237 |
| */ |
| #if 0 |
| parser_draining = GST_BASE_PARSE_DRAINING (parse); |
| |
| if (!parser_in_sync && !parser_draining) { |
| /* check for second frame to be sure */ |
| GST_DEBUG_OBJECT (dcaparse, "resyncing; checking next frame syncword"); |
| if (map.size >= (size + 16)) { |
| guint s2, r2, c2, n2, s3; |
| gboolean t; |
| |
| GST_MEMDUMP ("buf", map.data, size + 16); |
| gst_byte_reader_init (&r, map.data, map.size); |
| gst_byte_reader_skip_unchecked (&r, size); |
| |
| if (!gst_dca_parse_parse_header (dcaparse, &r, &s2, &r2, &c2, NULL, NULL, |
| &n2, &s3, &t)) { |
| GST_DEBUG_OBJECT (dcaparse, "didn't find second syncword"); |
| *skipsize = 4; |
| goto cleanup; |
| } |
| |
| /* ok, got sync now, let's assume constant frame size */ |
| gst_base_parse_set_min_frame_size (parse, size); |
| } else { |
| /* wait for some more data */ |
| GST_LOG_OBJECT (dcaparse, |
| "next sync out of reach (%" G_GSIZE_FORMAT " < %u)", map.size, |
| size + 16); |
| goto cleanup; |
| } |
| } |
| #endif |
| |
| /* found frame */ |
| ret = GST_FLOW_OK; |
| |
| /* metadata handling */ |
| block_size = num_blocks * samples_per_block; |
| |
| if (G_UNLIKELY (dcaparse->rate != rate || dcaparse->channels != chans |
| || dcaparse->depth != depth || dcaparse->endianness != endianness |
| || (!terminator && dcaparse->block_size != block_size) |
| || (size != dcaparse->frame_size))) { |
| GstCaps *caps; |
| |
| caps = gst_caps_new_simple ("audio/x-dts", |
| "framed", G_TYPE_BOOLEAN, TRUE, |
| "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, chans, |
| "endianness", G_TYPE_INT, endianness, "depth", G_TYPE_INT, depth, |
| "block-size", G_TYPE_INT, block_size, "frame-size", G_TYPE_INT, size, |
| NULL); |
| gst_pad_set_caps (GST_BASE_PARSE_SRC_PAD (parse), caps); |
| gst_caps_unref (caps); |
| |
| dcaparse->rate = rate; |
| dcaparse->channels = chans; |
| dcaparse->depth = depth; |
| dcaparse->endianness = endianness; |
| dcaparse->block_size = block_size; |
| dcaparse->frame_size = size; |
| |
| gst_base_parse_set_frame_rate (parse, rate, block_size, 0, 0); |
| } |
| |
| cleanup: |
| /* it is possible that DTS HD substream after DTS core */ |
| if (parse->flags & GST_BASE_PARSE_FLAG_DRAINING || map.size >= size + 9) { |
| extra_size = 0; |
| if (map.size >= size + 9) { |
| const guint8 *next = map.data + size; |
| /* Check for DTS_SYNCWORD_SUBSTREAM */ |
| if (next[0] == 0x64 && next[1] == 0x58 && next[2] == 0x20 |
| && next[3] == 0x25) { |
| /* 7.4.1 Extension Substream Header */ |
| GstBitReader reader; |
| gst_bit_reader_init (&reader, next + 4, 5); |
| gst_bit_reader_skip (&reader, 8 + 2); /* skip UserDefinedBits and nExtSSIndex) */ |
| if (gst_bit_reader_get_bits_uint8_unchecked (&reader, 1) == 0) { |
| gst_bit_reader_skip (&reader, 8); |
| extra_size = |
| gst_bit_reader_get_bits_uint32_unchecked (&reader, 16) + 1; |
| } else { |
| gst_bit_reader_skip (&reader, 12); |
| extra_size = |
| gst_bit_reader_get_bits_uint32_unchecked (&reader, 20) + 1; |
| } |
| } |
| } |
| gst_buffer_unmap (buf, &map); |
| if (ret == GST_FLOW_OK && size + extra_size <= map.size) { |
| ret = gst_base_parse_finish_frame (parse, frame, size + extra_size); |
| } else { |
| ret = GST_FLOW_OK; |
| } |
| } else { |
| gst_buffer_unmap (buf, &map); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * MPEG-PS private1 streams add a 2 bytes "Audio Substream Headers" for each |
| * buffer (not each frame) with the offset of the next frame's start. |
| * These 2 bytes can be dropped safely as they do not include any timing |
| * information, only the offset to the start of the next frame. |
| * See gstac3parse.c for a more detailed description. |
| * */ |
| |
| static GstFlowReturn |
| gst_dca_parse_chain_priv (GstPad * pad, GstObject * parent, GstBuffer * buffer) |
| { |
| GstDcaParse *dcaparse = GST_DCA_PARSE (parent); |
| GstFlowReturn ret; |
| GstBuffer *newbuf; |
| gsize size; |
| |
| size = gst_buffer_get_size (buffer); |
| if (size >= 2) { |
| newbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_ALL, 2, size - 2); |
| gst_buffer_unref (buffer); |
| ret = dcaparse->baseparse_chainfunc (pad, parent, newbuf); |
| } else { |
| gst_buffer_unref (buffer); |
| ret = GST_FLOW_OK; |
| } |
| |
| return ret; |
| } |
| |
| static void |
| remove_fields (GstCaps * caps) |
| { |
| guint i, n; |
| |
| n = gst_caps_get_size (caps); |
| for (i = 0; i < n; i++) { |
| GstStructure *s = gst_caps_get_structure (caps, i); |
| |
| gst_structure_remove_field (s, "framed"); |
| } |
| } |
| |
| static GstCaps * |
| gst_dca_parse_get_sink_caps (GstBaseParse * parse, GstCaps * filter) |
| { |
| GstCaps *peercaps, *templ; |
| GstCaps *res; |
| |
| templ = gst_pad_get_pad_template_caps (GST_BASE_PARSE_SINK_PAD (parse)); |
| if (filter) { |
| GstCaps *fcopy = gst_caps_copy (filter); |
| /* Remove the fields we convert */ |
| remove_fields (fcopy); |
| peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), fcopy); |
| gst_caps_unref (fcopy); |
| } else |
| peercaps = gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (parse), NULL); |
| |
| if (peercaps) { |
| /* Remove the framed field */ |
| peercaps = gst_caps_make_writable (peercaps); |
| remove_fields (peercaps); |
| |
| res = gst_caps_intersect_full (peercaps, templ, GST_CAPS_INTERSECT_FIRST); |
| gst_caps_unref (peercaps); |
| gst_caps_unref (templ); |
| } else { |
| res = templ; |
| } |
| |
| if (filter) { |
| GstCaps *intersection; |
| |
| intersection = |
| gst_caps_intersect_full (filter, res, GST_CAPS_INTERSECT_FIRST); |
| gst_caps_unref (res); |
| res = intersection; |
| } |
| |
| return res; |
| } |
| |
| static gboolean |
| gst_dca_parse_set_sink_caps (GstBaseParse * parse, GstCaps * caps) |
| { |
| GstStructure *s; |
| GstDcaParse *dcaparse = GST_DCA_PARSE (parse); |
| |
| s = gst_caps_get_structure (caps, 0); |
| if (gst_structure_has_name (s, "audio/x-private1-dts")) { |
| gst_pad_set_chain_function (parse->sinkpad, gst_dca_parse_chain_priv); |
| } else { |
| gst_pad_set_chain_function (parse->sinkpad, dcaparse->baseparse_chainfunc); |
| } |
| return TRUE; |
| } |
| |
| static GstFlowReturn |
| gst_dca_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame) |
| { |
| GstDcaParse *dcaparse = GST_DCA_PARSE (parse); |
| |
| if (!dcaparse->sent_codec_tag) { |
| GstTagList *taglist; |
| GstCaps *caps; |
| |
| /* codec tag */ |
| caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (parse)); |
| if (G_UNLIKELY (caps == NULL)) { |
| if (GST_PAD_IS_FLUSHING (GST_BASE_PARSE_SRC_PAD (parse))) { |
| GST_INFO_OBJECT (parse, "Src pad is flushing"); |
| return GST_FLOW_FLUSHING; |
| } else { |
| GST_INFO_OBJECT (parse, "Src pad is not negotiated!"); |
| return GST_FLOW_NOT_NEGOTIATED; |
| } |
| } |
| |
| taglist = gst_tag_list_new_empty (); |
| gst_pb_utils_add_codec_description_to_tag_list (taglist, |
| GST_TAG_AUDIO_CODEC, caps); |
| gst_caps_unref (caps); |
| |
| gst_base_parse_merge_tags (parse, taglist, GST_TAG_MERGE_REPLACE); |
| gst_tag_list_unref (taglist); |
| |
| /* also signals the end of first-frame processing */ |
| dcaparse->sent_codec_tag = TRUE; |
| } |
| |
| return GST_FLOW_OK; |
| } |