/* GStreamer * Copyright (C) <1999> Erik Walthinsen * Copyright (C) <2005> Jan Schmidt * * 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. */ /* Element-Checklist-Version: TODO */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstdvdlpcmdec.h" #include GST_DEBUG_CATEGORY_STATIC (dvdlpcm_debug); #define GST_CAT_DEFAULT dvdlpcm_debug static GstStaticPadTemplate gst_dvdlpcmdec_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-private1-lpcm; " "audio/x-lpcm, " "width = (int) { 16, 20, 24 }, " "rate = (int) { 32000, 44100, 48000, 96000 }, " "channels = (int) [ 1, 8 ], " "dynamic_range = (int) [ 0, 255 ], " "emphasis = (boolean) { TRUE, FALSE }, " "mute = (boolean) { TRUE, FALSE } ") ); static GstStaticPadTemplate gst_dvdlpcmdec_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("audio/x-raw, " "format = (string) { S16BE, S24BE }, " "layout = (string) interleaved, " "rate = (int) { 32000, 44100, 48000, 96000 }, " "channels = (int) [ 1, 8 ]") ); /* DvdLpcmDec signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0 /* FILL ME */ }; static void gst_dvdlpcmdec_base_init (gpointer g_class); static void gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass); static void gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec); static GstFlowReturn gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buffer); static GstFlowReturn gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, GstBuffer * buffer); static gboolean gst_dvdlpcmdec_setcaps (GstPad * pad, GstCaps * caps); static gboolean dvdlpcmdec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event); static GstStateChangeReturn gst_dvdlpcmdec_change_state (GstElement * element, GstStateChange transition); static GstElementClass *parent_class = NULL; GType gst_dvdlpcmdec_get_type (void) { static GType dvdlpcmdec_type = 0; if (!dvdlpcmdec_type) { static const GTypeInfo dvdlpcmdec_info = { sizeof (GstDvdLpcmDecClass), gst_dvdlpcmdec_base_init, NULL, (GClassInitFunc) gst_dvdlpcmdec_class_init, NULL, NULL, sizeof (GstDvdLpcmDec), 0, (GInstanceInitFunc) gst_dvdlpcmdec_init, }; dvdlpcmdec_type = g_type_register_static (GST_TYPE_ELEMENT, "GstDvdLpcmDec", &dvdlpcmdec_info, 0); } return dvdlpcmdec_type; } static void gst_dvdlpcmdec_base_init (gpointer g_class) { GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_dvdlpcmdec_sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_dvdlpcmdec_src_template)); gst_element_class_set_static_metadata (element_class, "DVD LPCM Audio decoder", "Codec/Decoder/Audio", "Decode DVD LPCM frames into standard PCM audio", "Jan Schmidt , Michael Smith "); } static void gst_dvdlpcmdec_class_init (GstDvdLpcmDecClass * klass) { GstElementClass *gstelement_class; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_peek_parent (klass); gstelement_class->change_state = gst_dvdlpcmdec_change_state; } static void gst_dvdlpcm_reset (GstDvdLpcmDec * dvdlpcmdec) { gst_audio_info_init (&dvdlpcmdec->info); dvdlpcmdec->dynamic_range = 0; dvdlpcmdec->emphasis = FALSE; dvdlpcmdec->mute = FALSE; dvdlpcmdec->timestamp = GST_CLOCK_TIME_NONE; dvdlpcmdec->header = 0; gst_segment_init (&dvdlpcmdec->segment, GST_FORMAT_UNDEFINED); } static void gst_dvdlpcmdec_init (GstDvdLpcmDec * dvdlpcmdec) { dvdlpcmdec->sinkpad = gst_pad_new_from_static_template (&gst_dvdlpcmdec_sink_template, "sink"); gst_pad_set_event_function (dvdlpcmdec->sinkpad, dvdlpcmdec_sink_event); gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->sinkpad); dvdlpcmdec->srcpad = gst_pad_new_from_static_template (&gst_dvdlpcmdec_src_template, "src"); gst_pad_use_fixed_caps (dvdlpcmdec->srcpad); gst_element_add_pad (GST_ELEMENT (dvdlpcmdec), dvdlpcmdec->srcpad); gst_dvdlpcm_reset (dvdlpcmdec); } static const GstAudioChannelPosition channel_positions[][8] = { {GST_AUDIO_CHANNEL_POSITION_MONO}, {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT}, {GST_AUDIO_CHANNEL_POSITION_INVALID}, {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, {GST_AUDIO_CHANNEL_POSITION_INVALID}, {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE1, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT}, {GST_AUDIO_CHANNEL_POSITION_INVALID}, {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT, GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT, GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER, GST_AUDIO_CHANNEL_POSITION_LFE1, GST_AUDIO_CHANNEL_POSITION_REAR_LEFT, GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT, GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT}, {GST_AUDIO_CHANNEL_POSITION_INVALID} }; static void gst_dvdlpcmdec_send_tags (GstDvdLpcmDec * dvdlpcmdec) { GstTagList *taglist; guint bitrate; gint bpf, rate; bpf = GST_AUDIO_INFO_BPF (&dvdlpcmdec->info); rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info); bitrate = bpf * 8 * rate; taglist = gst_tag_list_new (GST_TAG_AUDIO_CODEC, "LPCM Audio", GST_TAG_BITRATE, bitrate, NULL); gst_pad_push_event (dvdlpcmdec->srcpad, gst_event_new_tag (taglist)); } static gboolean gst_dvdlpcmdec_set_outcaps (GstDvdLpcmDec * dvdlpcmdec) { gboolean res = TRUE; GstCaps *src_caps; /* Build caps to set on the src pad, which we know from the incoming caps */ src_caps = gst_audio_info_to_caps (&dvdlpcmdec->info); res = gst_pad_set_caps (dvdlpcmdec->srcpad, src_caps); if (res) { GST_DEBUG_OBJECT (dvdlpcmdec, "Successfully set output caps: %" GST_PTR_FORMAT, src_caps); gst_dvdlpcmdec_send_tags (dvdlpcmdec); } else { GST_DEBUG_OBJECT (dvdlpcmdec, "Failed to set output caps: %" GST_PTR_FORMAT, src_caps); } gst_caps_unref (src_caps); return res; } static gboolean gst_dvdlpcmdec_setcaps (GstPad * pad, GstCaps * caps) { GstStructure *structure; gboolean res = TRUE; GstDvdLpcmDec *dvdlpcmdec; GstAudioFormat format; gint rate, channels, width; const GstAudioChannelPosition *position; g_return_val_if_fail (caps != NULL, FALSE); g_return_val_if_fail (pad != NULL, FALSE); dvdlpcmdec = GST_DVDLPCMDEC (gst_pad_get_parent (pad)); structure = gst_caps_get_structure (caps, 0); /* If we have the DVD structured LPCM (including header) then we wait * for incoming data before creating the output pad caps */ if (gst_structure_has_name (structure, "audio/x-private1-lpcm")) { gst_pad_set_chain_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_chain_dvd); goto done; } gst_pad_set_chain_function (dvdlpcmdec->sinkpad, gst_dvdlpcmdec_chain_raw); res &= gst_structure_get_int (structure, "rate", &rate); res &= gst_structure_get_int (structure, "channels", &channels); res &= gst_structure_get_int (structure, "width", &width); res &= gst_structure_get_int (structure, "dynamic_range", &dvdlpcmdec->dynamic_range); res &= gst_structure_get_boolean (structure, "emphasis", &dvdlpcmdec->emphasis); res &= gst_structure_get_boolean (structure, "mute", &dvdlpcmdec->mute); if (!res) goto caps_parse_error; switch (width) { case 24: case 20: format = GST_AUDIO_FORMAT_S24BE; break; case 16: format = GST_AUDIO_FORMAT_S16BE; break; default: format = GST_AUDIO_FORMAT_UNKNOWN; break; } gst_audio_info_set_format (&dvdlpcmdec->info, format, rate, channels, NULL); if (channels < 9 && channel_positions[channels - 1][0] != GST_AUDIO_CHANNEL_POSITION_INVALID) { dvdlpcmdec->info.flags &= ~GST_AUDIO_FLAG_UNPOSITIONED; position = channel_positions[channels - 1]; dvdlpcmdec->lpcm_layout = position; memcpy (dvdlpcmdec->info.position, position, sizeof (GstAudioChannelPosition) * channels); gst_audio_channel_positions_to_valid_order (dvdlpcmdec->info.position, channels); } dvdlpcmdec->width = width; res = gst_dvdlpcmdec_set_outcaps (dvdlpcmdec); done: gst_object_unref (dvdlpcmdec); return res; /* ERRORS */ caps_parse_error: { GST_DEBUG_OBJECT (dvdlpcmdec, "Couldn't get parameters; missing caps?"); gst_object_unref (dvdlpcmdec); return FALSE; } } static void update_timestamps (GstDvdLpcmDec * dvdlpcmdec, GstBuffer * buf, int samples) { gboolean take_buf_ts = FALSE; gint rate; rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info); GST_BUFFER_DURATION (buf) = gst_util_uint64_scale (samples, GST_SECOND, rate); if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { if (GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp)) { GstClockTimeDiff one_sample = GST_SECOND / rate; GstClockTimeDiff diff = GST_CLOCK_DIFF (GST_BUFFER_TIMESTAMP (buf), dvdlpcmdec->timestamp); if (diff > one_sample || diff < -one_sample) take_buf_ts = TRUE; } else { take_buf_ts = TRUE; } } else if (!GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp)) { dvdlpcmdec->timestamp = 0; } if (take_buf_ts) { /* Take buffer timestamp */ dvdlpcmdec->timestamp = GST_BUFFER_TIMESTAMP (buf); } else { GST_BUFFER_TIMESTAMP (buf) = dvdlpcmdec->timestamp; } dvdlpcmdec->timestamp += GST_BUFFER_DURATION (buf); GST_LOG_OBJECT (dvdlpcmdec, "Updated timestamp to %" GST_TIME_FORMAT, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf))); } static void parse_header (GstDvdLpcmDec * dec, guint32 header) { GstAudioFormat format; gint rate, channels, width; /* We don't actually use 'dynamic range', 'mute', or 'emphasis' currently, * but parse them out */ dec->dynamic_range = header & 0xff; dec->mute = (header & 0x400000) != 0; dec->emphasis = (header & 0x800000) != 0; /* These two bits tell us the bit depth */ switch (header & 0xC000) { case 0x8000: /* 24 bits in 3 bytes */ format = GST_AUDIO_FORMAT_S24BE; width = 24; break; case 0x4000: /* 20 bits in 3 bytes */ format = GST_AUDIO_FORMAT_S24BE; width = 20; break; default: format = GST_AUDIO_FORMAT_S16BE; width = 16; break; } dec->width = width; /* Only four sample rates supported */ switch (header & 0x3000) { case 0x0000: rate = 48000; break; case 0x1000: rate = 96000; break; case 0x2000: rate = 44100; break; case 0x3000: rate = 32000; break; default: rate = 0; break; } /* And, of course, the number of channels (up to 8) */ channels = ((header >> 8) & 0x7) + 1; gst_audio_info_set_format (&dec->info, format, rate, channels, NULL); if (channels < 9 && channel_positions[channels - 1][0] != GST_AUDIO_CHANNEL_POSITION_INVALID) { const GstAudioChannelPosition *position; dec->info.flags &= ~GST_AUDIO_FLAG_UNPOSITIONED; position = channel_positions[channels - 1]; dec->lpcm_layout = position; memcpy (dec->info.position, position, sizeof (GstAudioChannelPosition) * channels); gst_audio_channel_positions_to_valid_order (dec->info.position, channels); } } static GstFlowReturn gst_dvdlpcmdec_chain_dvd (GstPad * pad, GstObject * parent, GstBuffer * buf) { GstDvdLpcmDec *dvdlpcmdec; GstMapInfo map; guint8 *data; gsize size; guint first_access; guint32 header; GstBuffer *subbuf; GstFlowReturn ret = GST_FLOW_OK; gint off, len; gint rate, channels; dvdlpcmdec = GST_DVDLPCMDEC (parent); gst_buffer_map (buf, &map, GST_MAP_READ); data = map.data; size = map.size; if (size < 5) goto too_small; /* We have a 5 byte header, now. * The first two bytes are a (big endian) 16 bit offset into our buffer. * The buffer timestamp refers to this offset. * * The other three bytes are a (big endian) number in which the header is * encoded. */ first_access = (data[0] << 8) | data[1]; if (first_access > size) goto invalid_data; /* Don't keep the 'frame number' low 5 bits of the first byte */ header = ((data[2] & 0xC0) << 16) | (data[3] << 8) | data[4]; /* see if we have a new header */ if (header != dvdlpcmdec->header) { parse_header (dvdlpcmdec, header); if (!gst_dvdlpcmdec_set_outcaps (dvdlpcmdec)) goto negotiation_failed; dvdlpcmdec->header = header; } GST_LOG_OBJECT (dvdlpcmdec, "first_access %d, buffer length %" G_GSIZE_FORMAT, first_access, size); rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info); channels = GST_AUDIO_INFO_CHANNELS (&dvdlpcmdec->info); /* After first_access, we have an additional 3 bytes of data we've parsed and * don't want to handle; this is included within the value of first_access. * So a first_access value of between 1 and 3 is just broken, we treat that * the same as zero. first_access == 4 means we only need to create a single * sub-buffer, greater than that we need to create two. */ /* skip access unit bytes and info */ off = 5; if (first_access > 4) { guint samples = 0; GstClockTime ts; /* length of first buffer */ len = first_access - 4; GST_LOG_OBJECT (dvdlpcmdec, "Creating first sub-buffer off %d, len %d", off, len); /* see if we need a subbuffer without timestamp */ if (off + len > size) goto bad_first_access; subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len); /* If we don't have a stored timestamp from the last packet, * (it's straight after a new-segment, but we have one on the * first access buffer, then calculate the timestamp to align * this buffer to just before the first_access buffer */ if (!GST_CLOCK_TIME_IS_VALID (dvdlpcmdec->timestamp) && GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { switch (dvdlpcmdec->width) { case 16: samples = len / channels / 2; break; case 20: samples = (len / channels) * 2 / 5; break; case 24: samples = len / channels / 3; break; } } if (samples != 0) { ts = gst_util_uint64_scale (samples, GST_SECOND, rate); if (ts < GST_BUFFER_TIMESTAMP (buf)) GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf) - ts; else GST_BUFFER_TIMESTAMP (subbuf) = 0; } else { GST_BUFFER_TIMESTAMP (subbuf) = GST_CLOCK_TIME_NONE; } ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf); if (ret != GST_FLOW_OK) goto done; /* then the buffer with new timestamp */ off += len; len = size - off; GST_LOG_OBJECT (dvdlpcmdec, "Creating next sub-buffer off %d, len %d", off, len); if (len > 0) { subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, len); GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf); ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf); } } else { GST_LOG_OBJECT (dvdlpcmdec, "Creating single sub-buffer off %d, len %" G_GSIZE_FORMAT, off, size - off); subbuf = gst_buffer_copy_region (buf, GST_BUFFER_COPY_ALL, off, size - off); GST_BUFFER_TIMESTAMP (subbuf) = GST_BUFFER_TIMESTAMP (buf); ret = gst_dvdlpcmdec_chain_raw (pad, parent, subbuf); } done: gst_buffer_unmap (buf, &map); gst_buffer_unref (buf); return ret; /* ERRORS */ too_small: { /* Buffer is too small */ GST_ELEMENT_WARNING (dvdlpcmdec, STREAM, DECODE, ("Invalid data found parsing LPCM packet"), ("LPCM packet was too small. Dropping")); ret = GST_FLOW_OK; goto done; } invalid_data: { GST_ELEMENT_WARNING (dvdlpcmdec, STREAM, DECODE, ("Invalid data found parsing LPCM packet"), ("LPCM packet contained invalid first access. Dropping")); ret = GST_FLOW_OK; goto done; } negotiation_failed: { GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL), ("Failed to configure output format")); ret = GST_FLOW_NOT_NEGOTIATED; goto done; } bad_first_access: { GST_WARNING_OBJECT (pad, "Bad first_access parameter in buffer"); GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, DECODE, (NULL), ("first_access parameter out of range: bad buffer from demuxer")); ret = GST_FLOW_ERROR; goto done; } } static GstFlowReturn gst_dvdlpcmdec_chain_raw (GstPad * pad, GstObject * parent, GstBuffer * buf) { GstDvdLpcmDec *dvdlpcmdec; gsize size; GstFlowReturn ret; guint samples = 0; gint rate, channels; dvdlpcmdec = GST_DVDLPCMDEC (parent); size = gst_buffer_get_size (buf); GST_LOG_OBJECT (dvdlpcmdec, "got buffer %p of size %" G_GSIZE_FORMAT " with ts %" GST_TIME_FORMAT, buf, size, GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf))); rate = GST_AUDIO_INFO_RATE (&dvdlpcmdec->info); channels = GST_AUDIO_INFO_CHANNELS (&dvdlpcmdec->info); if (rate == 0) goto not_negotiated; if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) dvdlpcmdec->timestamp = GST_BUFFER_TIMESTAMP (buf); /* We don't currently do anything at all regarding emphasis, mute or * dynamic_range - I'm not sure what they're for */ switch (dvdlpcmdec->width) { case 16: { /* We can just pass 16-bits straight through intact, once we set * appropriate things on the buffer */ samples = size / channels / 2; if (samples < 1) goto drop; buf = gst_buffer_make_writable (buf); break; } case 20: { /* Allocate a new buffer and copy 20-bit width to 24-bit */ gint64 samples = size * 8 / 20; gint64 count = size / 10; gint64 i; GstMapInfo srcmap, destmap; guint8 *src; guint8 *dest; GstBuffer *outbuf; if (samples < 1) goto drop; outbuf = gst_buffer_new_allocate (NULL, samples * 3, NULL); gst_buffer_copy_into (outbuf, buf, GST_BUFFER_COPY_TIMESTAMPS, 0, -1); /* adjust samples so we can calc the new timestamp */ samples = samples / channels; gst_buffer_map (buf, &srcmap, GST_MAP_READ); gst_buffer_map (outbuf, &destmap, GST_MAP_WRITE); src = srcmap.data; dest = destmap.data; /* Copy 20-bit LPCM format to 24-bit buffers, with 0x00 in the lowest * nibble. Note that the first 2 bytes are already correct */ for (i = 0; i < count; i++) { dest[0] = src[0]; dest[1] = src[1]; dest[2] = src[8] & 0xf0; dest[3] = src[2]; dest[4] = src[3]; dest[5] = (src[8] & 0x0f) << 4; dest[6] = src[4]; dest[7] = src[5]; dest[8] = src[9] & 0x0f; dest[9] = src[6]; dest[10] = src[7]; dest[11] = (src[9] & 0x0f) << 4; src += 10; dest += 12; } gst_buffer_unmap (outbuf, &destmap); gst_buffer_unmap (buf, &srcmap); gst_buffer_unref (buf); buf = outbuf; break; } case 24: { /* Rearrange 24-bit LPCM format in-place. Note that the first 2 * and last byte are already correct */ guint count = size / 12; gint i; GstMapInfo map; guint8 *ptr; samples = size / channels / 3; if (samples < 1) goto drop; /* Ensure our output buffer is writable */ buf = gst_buffer_make_writable (buf); gst_buffer_map (buf, &map, GST_MAP_READWRITE); ptr = map.data; for (i = 0; i < count; i++) { guint8 tmp; tmp = ptr[10]; ptr[10] = ptr[7]; ptr[7] = ptr[5]; ptr[5] = ptr[9]; ptr[9] = ptr[6]; ptr[6] = ptr[4]; ptr[4] = ptr[3]; ptr[3] = ptr[2]; ptr[2] = ptr[8]; ptr[8] = tmp; ptr += 12; } gst_buffer_unmap (buf, &map); break; } default: goto invalid_width; } update_timestamps (dvdlpcmdec, buf, samples); if (dvdlpcmdec->lpcm_layout) gst_audio_buffer_reorder_channels (buf, dvdlpcmdec->info.finfo->format, dvdlpcmdec->info.channels, dvdlpcmdec->lpcm_layout, dvdlpcmdec->info.position); ret = gst_pad_push (dvdlpcmdec->srcpad, buf); done: return ret; /* ERRORS */ drop: { GST_DEBUG_OBJECT (dvdlpcmdec, "Buffer of size %" G_GSIZE_FORMAT " is too small. Dropping", size); gst_buffer_unref (buf); ret = GST_FLOW_OK; goto done; } not_negotiated: { GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, FORMAT, (NULL), ("Buffer pushed before negotiation")); gst_buffer_unref (buf); ret = GST_FLOW_NOT_NEGOTIATED; goto done; } invalid_width: { GST_ELEMENT_ERROR (dvdlpcmdec, STREAM, WRONG_TYPE, (NULL), ("Invalid sample width configured")); gst_buffer_unref (buf); ret = GST_FLOW_NOT_NEGOTIATED; goto done; } } static gboolean dvdlpcmdec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event) { GstDvdLpcmDec *dvdlpcmdec; gboolean res; dvdlpcmdec = GST_DVDLPCMDEC (parent); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_CAPS: { GstCaps *caps; gst_event_parse_caps (event, &caps); res = gst_dvdlpcmdec_setcaps (pad, caps); gst_event_unref (event); break; } case GST_EVENT_SEGMENT: { GstSegment seg; gst_event_copy_segment (event, &seg); GST_DEBUG_OBJECT (dvdlpcmdec, "segment %" GST_SEGMENT_FORMAT, &seg); dvdlpcmdec->segment = seg; if (seg.format == GST_FORMAT_TIME) { dvdlpcmdec->timestamp = GST_CLOCK_TIME_NONE; } else { dvdlpcmdec->timestamp = 0; } res = gst_pad_push_event (dvdlpcmdec->srcpad, event); break; } case GST_EVENT_FLUSH_STOP: gst_segment_init (&dvdlpcmdec->segment, GST_FORMAT_UNDEFINED); res = gst_pad_push_event (dvdlpcmdec->srcpad, event); break; default: res = gst_pad_push_event (dvdlpcmdec->srcpad, event); break; } return res; } static GstStateChangeReturn gst_dvdlpcmdec_change_state (GstElement * element, GstStateChange transition) { GstDvdLpcmDec *dvdlpcmdec = GST_DVDLPCMDEC (element); GstStateChangeReturn res; switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: gst_dvdlpcm_reset (dvdlpcmdec); break; default: break; } res = parent_class->change_state (element, transition); switch (transition) { default: break; } return res; } static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (dvdlpcm_debug, "dvdlpcmdec", 0, "DVD LPCM Decoder"); if (!gst_element_register (plugin, "dvdlpcmdec", GST_RANK_PRIMARY, GST_TYPE_DVDLPCMDEC)) { return FALSE; } return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, dvdlpcmdec, "Decode DVD LPCM frames into standard PCM", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);