diff options
Diffstat (limited to 'ext/opus')
-rw-r--r-- | ext/opus/gstopuscommon.c | 18 | ||||
-rw-r--r-- | ext/opus/gstopuscommon.h | 3 | ||||
-rw-r--r-- | ext/opus/gstopusdec.c | 13 | ||||
-rw-r--r-- | ext/opus/gstopusenc.c | 207 | ||||
-rw-r--r-- | ext/opus/gstopusenc.h | 4 | ||||
-rw-r--r-- | ext/opus/gstopusheader.c | 17 | ||||
-rw-r--r-- | ext/opus/gstopusheader.h | 2 | ||||
-rw-r--r-- | ext/opus/gstopusparse.c | 2 |
8 files changed, 214 insertions, 52 deletions
diff --git a/ext/opus/gstopuscommon.c b/ext/opus/gstopuscommon.c index 426c5b897..dbf585a82 100644 --- a/ext/opus/gstopuscommon.c +++ b/ext/opus/gstopuscommon.c @@ -17,6 +17,8 @@ * Boston, MA 02111-1307, USA. */ +#include <stdio.h> +#include <string.h> #include "gstopuscommon.h" /* http://www.xiph.org/vorbis/doc/Vorbis_I_spec.html#x1-800004.3.9 */ @@ -86,3 +88,19 @@ const char *gst_opus_channel_names[] = { "side right", "none" }; + +void +gst_opus_common_log_channel_mapping_table (GstElement * element, + GstDebugCategory * category, const char *msg, int n_channels, + const guint8 * table) +{ + char s[8 + 256 * 4] = "[ "; /* enough for 256 times "255 " at most */ + int n; + + for (n = 0; n < n_channels; ++n) { + size_t len = strlen (s); + snprintf (s + len, sizeof (s) - len, "%d ", table[n]); + } + strcat (s, "]"); + GST_CAT_LEVEL_LOG (category, GST_LEVEL_INFO, element, "%s: %s", msg, s); +} diff --git a/ext/opus/gstopuscommon.h b/ext/opus/gstopuscommon.h index 65b944e9e..1fba5650d 100644 --- a/ext/opus/gstopuscommon.h +++ b/ext/opus/gstopuscommon.h @@ -28,6 +28,9 @@ G_BEGIN_DECLS extern const GstAudioChannelPosition gst_opus_channel_positions[][8]; extern const char *gst_opus_channel_names[]; +extern void gst_opus_common_log_channel_mapping_table (GstElement *element, + GstDebugCategory * category, const char *msg, + int n_channels, const guint8 *table); G_END_DECLS diff --git a/ext/opus/gstopusdec.c b/ext/opus/gstopusdec.c index 625c47797..7776f5812 100644 --- a/ext/opus/gstopusdec.c +++ b/ext/opus/gstopusdec.c @@ -357,9 +357,16 @@ opus_dec_chain_parse_data (GstOpusDec * dec, GstBuffer * buffer) GST_DEBUG_OBJECT (dec, "Creating decoder with %d channels, %d Hz", dec->n_channels, dec->sample_rate); - dec->state = opus_multistream_decoder_create (dec->sample_rate, - dec->n_channels, dec->n_streams, dec->n_stereo_streams, - dec->channel_mapping, &err); +#ifndef GST_DISABLE_DEBUG + gst_opus_common_log_channel_mapping_table (GST_ELEMENT (dec), opusdec_debug, + "Mapping table", dec->n_channels, dec->channel_mapping); +#endif + + GST_DEBUG_OBJECT (dec, "%d streams, %d stereo", dec->n_streams, + dec->n_stereo_streams); + dec->state = + opus_multistream_decoder_create (dec->sample_rate, dec->n_channels, + dec->n_streams, dec->n_stereo_streams, dec->channel_mapping, &err); if (!dec->state || err != OPUS_OK) goto creation_failed; } diff --git a/ext/opus/gstopusenc.c b/ext/opus/gstopusenc.c index f747a3736..e7d6842a1 100644 --- a/ext/opus/gstopusenc.c +++ b/ext/opus/gstopusenc.c @@ -417,7 +417,50 @@ gst_opus_enc_get_frame_samples (GstOpusEnc * enc) } static void -gst_opus_enc_setup_channel_mapping (GstOpusEnc * enc, const GstAudioInfo * info) +gst_opus_enc_setup_trivial_mapping (GstOpusEnc * enc, guint8 mapping[256]) +{ + int n; + + for (n = 0; n < 255; ++n) + mapping[n] = n; +} + +static int +gst_opus_enc_find_channel_position (GstOpusEnc * enc, const GstAudioInfo * info, + GstAudioChannelPosition position) +{ + int n; + for (n = 0; n < enc->n_channels; ++n) { + if (GST_AUDIO_INFO_POSITION (info, n) == position) { + return n; + } + } + return -1; +} + +static int +gst_opus_enc_find_channel_position_in_vorbis_order (GstOpusEnc * enc, + GstAudioChannelPosition position) +{ + int c; + + for (c = 0; c < enc->n_channels; ++c) { + if (gst_opus_channel_positions[enc->n_channels - 1][c] == position) { + GST_INFO_OBJECT (enc, + "Channel position %s maps to index %d in Vorbis order", + gst_opus_channel_names[position], c); + return c; + } + } + GST_WARNING_OBJECT (enc, + "Channel position %s is not representable in Vorbis order", + gst_opus_channel_names[position]); + return -1; +} + +static void +gst_opus_enc_setup_channel_mappings (GstOpusEnc * enc, + const GstAudioInfo * info) { #define MAPS(idx,pos) (GST_AUDIO_INFO_POSITION (info, (idx)) == GST_AUDIO_CHANNEL_POSITION_##pos) @@ -427,14 +470,15 @@ gst_opus_enc_setup_channel_mapping (GstOpusEnc * enc, const GstAudioInfo * info) enc->n_channels); /* Start by setting up a default trivial mapping */ - for (n = 0; n < 255; ++n) - enc->channel_mapping[n] = n; + enc->n_stereo_streams = 0; + gst_opus_enc_setup_trivial_mapping (enc, enc->encoding_channel_mapping); + gst_opus_enc_setup_trivial_mapping (enc, enc->decoding_channel_mapping); /* For one channel, use the basic RTP mapping */ if (enc->n_channels == 1) { GST_INFO_OBJECT (enc, "Mono, trivial RTP mapping"); enc->channel_mapping_family = 0; - enc->channel_mapping[0] = 0; + /* implicit mapping for family 0 */ return; } @@ -444,9 +488,11 @@ gst_opus_enc_setup_channel_mapping (GstOpusEnc * enc, const GstAudioInfo * info) if (MAPS (0, FRONT_LEFT) && MAPS (1, FRONT_RIGHT)) { GST_INFO_OBJECT (enc, "Stereo, canonical mapping"); enc->channel_mapping_family = 0; + enc->n_stereo_streams = 1; /* The channel mapping is implicit for family 0, that's why we do not attempt to create one for right/left - this will be mapped to the Vorbis mapping below. */ + return; } else { GST_DEBUG_OBJECT (enc, "Stereo, but not canonical mapping, continuing"); } @@ -454,42 +500,115 @@ gst_opus_enc_setup_channel_mapping (GstOpusEnc * enc, const GstAudioInfo * info) /* For channels between 1 and 8, we use the Vorbis mapping if we can find a permutation that matches it. Mono will have been taken care - of earlier, but this code also handles it. */ + of earlier, but this code also handles it. Same for left/right stereo. + There are two mappings. One maps the input channels to an ordering + which has the natural pairs first so they can benefit from the Opus + stereo channel coupling, and the other maps this ordering to the + Vorbis ordering. */ if (enc->n_channels >= 1 && enc->n_channels <= 8) { + int c0, c1, c0v, c1v; + int mapped; + gboolean positions_done[256]; + static const GstAudioChannelPosition pairs[][2] = { + {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_FRONT_LEFT_OF_CENTER, + GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER}, + {GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER, + GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER}, + {GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT, + GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT}, + }; + size_t pair; + GST_DEBUG_OBJECT (enc, - "In range for the Vorbis mapping, checking channel positions"); - for (n = 0; n < enc->n_channels; ++n) { - GstAudioChannelPosition pos = GST_AUDIO_INFO_POSITION (info, n); - int c; - - GST_DEBUG_OBJECT (enc, "Channel %d has position %d (%s)", n, pos, - gst_opus_channel_names[pos]); - for (c = 0; c < enc->n_channels; ++c) { - if (gst_opus_channel_positions[enc->n_channels - 1][c] == pos) { - GST_DEBUG_OBJECT (enc, "Found in Vorbis mapping as channel %d", c); - break; + "In range for the Vorbis mapping, building channel mapping tables"); + + enc->n_stereo_streams = 0; + mapped = 0; + for (n = 0; n < 256; ++n) + positions_done[n] = FALSE; + + /* First, find any natural pairs, and move them to the front */ + for (pair = 0; pair < G_N_ELEMENTS (pairs); ++pair) { + GstAudioChannelPosition p0 = pairs[pair][0]; + GstAudioChannelPosition p1 = pairs[pair][1]; + c0 = gst_opus_enc_find_channel_position (enc, info, p0); + c1 = gst_opus_enc_find_channel_position (enc, info, p1); + if (c0 >= 0 && c1 >= 0) { + /* We found a natural pair */ + GST_DEBUG_OBJECT (enc, "Natural pair '%s/%s' found at %d %d", + gst_opus_channel_names[p0], gst_opus_channel_names[p1], c0, c1); + /* Find where they map in Vorbis order */ + c0v = gst_opus_enc_find_channel_position_in_vorbis_order (enc, p0); + c1v = gst_opus_enc_find_channel_position_in_vorbis_order (enc, p1); + if (c0v < 0 || c1v < 0) { + GST_WARNING_OBJECT (enc, + "Cannot map channel positions to Vorbis order, using unknown mapping"); + enc->channel_mapping_family = 255; + enc->n_stereo_streams = 0; + return; } + + enc->encoding_channel_mapping[mapped] = c0; + enc->encoding_channel_mapping[mapped + 1] = c1; + enc->decoding_channel_mapping[c0v] = mapped; + enc->decoding_channel_mapping[c1v] = mapped + 1; + enc->n_stereo_streams++; + mapped += 2; + positions_done[p0] = positions_done[p1] = TRUE; } - if (c == enc->n_channels) { - /* We did not find that position, so use undefined */ - GST_WARNING_OBJECT (enc, - "Position %d (%s) not found in Vorbis mapping, using unknown mapping", - pos, gst_opus_channel_positions[pos]); - enc->channel_mapping_family = 255; - return; + } + + /* Now add all other input channels as mono streams */ + for (n = 0; n < enc->n_channels; ++n) { + GstAudioChannelPosition position = GST_AUDIO_INFO_POSITION (info, n); + + /* if we already mapped it while searching for pairs, nothing else + needs to be done */ + if (!positions_done[position]) { + int cv; + GST_DEBUG_OBJECT (enc, "Channel position %s is not mapped yet, adding", + gst_opus_channel_names[position]); + cv = gst_opus_enc_find_channel_position_in_vorbis_order (enc, position); + if (cv < 0) { + GST_WARNING_OBJECT (enc, + "Cannot map channel positions to Vorbis order, using unknown mapping"); + enc->channel_mapping_family = 255; + enc->n_stereo_streams = 0; + return; + } + enc->encoding_channel_mapping[mapped] = n; + enc->decoding_channel_mapping[cv] = mapped; + mapped++; } - GST_DEBUG_OBJECT (enc, "Mapping output channel %d to %d (%s)", c, n, - gst_opus_channel_names[pos]); - enc->channel_mapping[c] = n; } - GST_INFO_OBJECT (enc, "Permutation found, using Vorbis mapping"); + +#ifndef GST_DISABLE_DEBUG + GST_INFO_OBJECT (enc, + "Mapping tables built: %d channels, %d stereo streams", enc->n_channels, + enc->n_stereo_streams); + gst_opus_common_log_channel_mapping_table (GST_ELEMENT (enc), opusenc_debug, + "Encoding mapping table", enc->n_channels, + enc->encoding_channel_mapping); + gst_opus_common_log_channel_mapping_table (GST_ELEMENT (enc), opusenc_debug, + "Decoding mapping table", enc->n_channels, + enc->decoding_channel_mapping); +#endif + enc->channel_mapping_family = 1; return; } - /* For other cases, we use undefined, with the default trivial mapping */ + /* More than 8 channels, if future mappings are added for those */ + + /* For other cases, we use undefined, with the default trivial mapping + and all mono streams */ GST_WARNING_OBJECT (enc, "Unknown mapping"); enc->channel_mapping_family = 255; + enc->n_stereo_streams = 0; #undef MAPS } @@ -505,7 +624,7 @@ gst_opus_enc_set_format (GstAudioEncoder * benc, GstAudioInfo * info) enc->n_channels = GST_AUDIO_INFO_CHANNELS (info); enc->sample_rate = GST_AUDIO_INFO_RATE (info); - gst_opus_enc_setup_channel_mapping (enc, info); + gst_opus_enc_setup_channel_mappings (enc, info); GST_DEBUG_OBJECT (benc, "Setup with %d channels, %d Hz", enc->n_channels, enc->sample_rate); @@ -530,17 +649,24 @@ gst_opus_enc_set_format (GstAudioEncoder * benc, GstAudioInfo * info) static gboolean gst_opus_enc_setup (GstOpusEnc * enc) { - int error = OPUS_OK, n; - guint8 trivial_mapping[256]; - - GST_DEBUG_OBJECT (enc, "setup"); - - for (n = 0; n < 256; ++n) - trivial_mapping[n] = n; + int error = OPUS_OK; + +#ifndef GST_DISABLE_DEBUG + GST_DEBUG_OBJECT (enc, + "setup: %d Hz, %d channels, %d stereo streams, family %d", + enc->sample_rate, enc->n_channels, enc->n_stereo_streams, + enc->channel_mapping_family); + GST_INFO_OBJECT (enc, "Mapping tables built: %d channels, %d stereo streams", + enc->n_channels, enc->n_stereo_streams); + gst_opus_common_log_channel_mapping_table (GST_ELEMENT (enc), opusenc_debug, + "Encoding mapping table", enc->n_channels, enc->encoding_channel_mapping); + gst_opus_common_log_channel_mapping_table (GST_ELEMENT (enc), opusenc_debug, + "Decoding mapping table", enc->n_channels, enc->decoding_channel_mapping); +#endif - enc->state = - opus_multistream_encoder_create (enc->sample_rate, enc->n_channels, - enc->n_channels, 0, trivial_mapping, + enc->state = opus_multistream_encoder_create (enc->sample_rate, + enc->n_channels, enc->n_channels - enc->n_stereo_streams, + enc->n_stereo_streams, enc->encoding_channel_mapping, enc->audio_or_voip ? OPUS_APPLICATION_AUDIO : OPUS_APPLICATION_VOIP, &error); if (!enc->state || error != OPUS_OK) @@ -698,7 +824,8 @@ gst_opus_enc_handle_frame (GstAudioEncoder * benc, GstBuffer * buf) enc->headers = NULL; gst_opus_header_create_caps (&caps, &enc->headers, enc->n_channels, - enc->sample_rate, enc->channel_mapping_family, enc->channel_mapping, + enc->n_stereo_streams, enc->sample_rate, enc->channel_mapping_family, + enc->decoding_channel_mapping, gst_tag_setter_get_tag_list (GST_TAG_SETTER (enc))); diff --git a/ext/opus/gstopusenc.h b/ext/opus/gstopusenc.h index 8c2c3c6e8..1e39ad03d 100644 --- a/ext/opus/gstopusenc.h +++ b/ext/opus/gstopusenc.h @@ -79,7 +79,9 @@ struct _GstOpusEnc { GstTagList *tags; guint8 channel_mapping_family; - guint8 channel_mapping[256]; + guint8 encoding_channel_mapping[256]; + guint8 decoding_channel_mapping[256]; + guint8 n_stereo_streams; }; struct _GstOpusEncClass { diff --git a/ext/opus/gstopusheader.c b/ext/opus/gstopusheader.c index 42df7b35f..7f49e4711 100644 --- a/ext/opus/gstopusheader.c +++ b/ext/opus/gstopusheader.c @@ -27,12 +27,17 @@ #include "gstopusheader.h" static GstBuffer * -gst_opus_enc_create_id_buffer (gint nchannels, gint sample_rate, - guint8 channel_mapping_family, const guint8 * channel_mapping) +gst_opus_enc_create_id_buffer (gint nchannels, gint n_stereo_streams, + gint sample_rate, guint8 channel_mapping_family, + const guint8 * channel_mapping) { GstBuffer *buffer; GstByteWriter bw; + g_return_val_if_fail (nchannels > 0 && nchannels < 256, NULL); + g_return_val_if_fail (n_stereo_streams >= 0, NULL); + g_return_val_if_fail (n_stereo_streams <= nchannels - n_stereo_streams, NULL); + gst_byte_writer_init (&bw); /* See http://wiki.xiph.org/OggOpus */ @@ -44,8 +49,8 @@ gst_opus_enc_create_id_buffer (gint nchannels, gint sample_rate, gst_byte_writer_put_uint16_le (&bw, 0); /* output gain */ gst_byte_writer_put_uint8 (&bw, channel_mapping_family); if (channel_mapping_family > 0) { - gst_byte_writer_put_uint8 (&bw, nchannels); - gst_byte_writer_put_uint8 (&bw, 0); + gst_byte_writer_put_uint8 (&bw, nchannels - n_stereo_streams); + gst_byte_writer_put_uint8 (&bw, n_stereo_streams); gst_byte_writer_put_data (&bw, channel_mapping, nchannels); } @@ -158,7 +163,7 @@ gst_opus_header_create_caps_from_headers (GstCaps ** caps, GSList ** headers, void gst_opus_header_create_caps (GstCaps ** caps, GSList ** headers, gint nchannels, - gint sample_rate, guint8 channel_mapping_family, + gint n_stereo_streams, gint sample_rate, guint8 channel_mapping_family, const guint8 * channel_mapping, const GstTagList * tags) { GstBuffer *buf1, *buf2; @@ -175,7 +180,7 @@ gst_opus_header_create_caps (GstCaps ** caps, GSList ** headers, gint nchannels, /* create header buffers */ buf1 = - gst_opus_enc_create_id_buffer (nchannels, sample_rate, + gst_opus_enc_create_id_buffer (nchannels, n_stereo_streams, sample_rate, channel_mapping_family, channel_mapping); buf2 = gst_opus_enc_create_metadata_buffer (tags); diff --git a/ext/opus/gstopusheader.h b/ext/opus/gstopusheader.h index 3b2cfc265..c6278eff3 100644 --- a/ext/opus/gstopusheader.h +++ b/ext/opus/gstopusheader.h @@ -28,7 +28,7 @@ G_BEGIN_DECLS extern void gst_opus_header_create_caps_from_headers (GstCaps **caps, GSList **headers, GstBuffer *id_header, GstBuffer *comment_header); extern void gst_opus_header_create_caps (GstCaps **caps, GSList **headers, - gint nchannels, gint sample_rate, + gint nchannels, gint n_stereo_streams, gint sample_rate, guint8 channel_mapping_family, const guint8 *channel_mapping, const GstTagList *tags); extern gboolean gst_opus_header_is_header (GstBuffer * buf, diff --git a/ext/opus/gstopusparse.c b/ext/opus/gstopusparse.c index fae62007e..f3706cb72 100644 --- a/ext/opus/gstopusparse.c +++ b/ext/opus/gstopusparse.c @@ -307,7 +307,7 @@ gst_opus_parse_parse_frame (GstBaseParse * base, GstBaseParseFrame * frame) channel_mapping_family = 0; channel_mapping[0] = 0; channel_mapping[1] = 1; - gst_opus_header_create_caps (&caps, &parse->headers, channels, 0, + gst_opus_header_create_caps (&caps, &parse->headers, channels, 1, 0, channel_mapping_family, channel_mapping, NULL); } |