| /* GStreamer |
| * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> |
| * |
| * 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. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #include <string.h> |
| |
| #include <inttypes.h> |
| |
| #include "gstmpeg2dec.h" |
| |
| #include <gst/video/gstvideometa.h> |
| #include <gst/video/gstvideopool.h> |
| |
| /* 16byte-aligns a buffer for libmpeg2 */ |
| #define ALIGN_16(p) ((void *)(((uintptr_t)(p) + 15) & ~((uintptr_t)15))) |
| |
| GST_DEBUG_CATEGORY_STATIC (mpeg2dec_debug); |
| #define GST_CAT_DEFAULT mpeg2dec_debug |
| GST_DEBUG_CATEGORY_STATIC (CAT_PERFORMANCE); |
| |
| /* Send a warning message about decoding errors after receiving this many |
| * STATE_INVALID return values from mpeg2_parse. -1 means never. |
| */ |
| #define WARN_THRESHOLD (5) |
| |
| static GstStaticPadTemplate sink_template_factory = |
| GST_STATIC_PAD_TEMPLATE ("sink", |
| GST_PAD_SINK, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("video/mpeg, " |
| "mpegversion = (int) [ 1, 2 ], " "systemstream = (boolean) false") |
| ); |
| |
| static GstStaticPadTemplate src_template_factory = |
| GST_STATIC_PAD_TEMPLATE ("src", |
| GST_PAD_SRC, |
| GST_PAD_ALWAYS, |
| GST_STATIC_CAPS ("video/x-raw, " |
| "format = (string) { YV12, I420, Y42B, Y444 }, " |
| "width = (int) [ 16, 4096 ], " |
| "height = (int) [ 16, 4096 ], " |
| "framerate = (fraction) [ 0/1, 2147483647/1 ]") |
| ); |
| |
| #define gst_mpeg2dec_parent_class parent_class |
| G_DEFINE_TYPE (GstMpeg2dec, gst_mpeg2dec, GST_TYPE_VIDEO_DECODER); |
| |
| static void gst_mpeg2dec_finalize (GObject * object); |
| |
| /* GstVideoDecoder base class method */ |
| static gboolean gst_mpeg2dec_open (GstVideoDecoder * decoder); |
| static gboolean gst_mpeg2dec_close (GstVideoDecoder * decoder); |
| static gboolean gst_mpeg2dec_start (GstVideoDecoder * decoder); |
| static gboolean gst_mpeg2dec_stop (GstVideoDecoder * decoder); |
| static gboolean gst_mpeg2dec_set_format (GstVideoDecoder * decoder, |
| GstVideoCodecState * state); |
| static gboolean gst_mpeg2dec_flush (GstVideoDecoder * decoder); |
| static GstFlowReturn gst_mpeg2dec_finish (GstVideoDecoder * decoder); |
| static GstFlowReturn gst_mpeg2dec_handle_frame (GstVideoDecoder * decoder, |
| GstVideoCodecFrame * frame); |
| static gboolean gst_mpeg2dec_decide_allocation (GstVideoDecoder * decoder, |
| GstQuery * query); |
| |
| static void gst_mpeg2dec_clear_buffers (GstMpeg2dec * mpeg2dec); |
| static gboolean gst_mpeg2dec_crop_buffer (GstMpeg2dec * dec, |
| GstVideoCodecFrame * in_frame, GstVideoFrame * in_vframe); |
| |
| static void |
| gst_mpeg2dec_class_init (GstMpeg2decClass * klass) |
| { |
| GObjectClass *gobject_class = G_OBJECT_CLASS (klass); |
| GstElementClass *element_class = GST_ELEMENT_CLASS (klass); |
| GstVideoDecoderClass *video_decoder_class = GST_VIDEO_DECODER_CLASS (klass); |
| |
| gobject_class->finalize = gst_mpeg2dec_finalize; |
| |
| gst_element_class_add_static_pad_template (element_class, |
| &src_template_factory); |
| gst_element_class_add_static_pad_template (element_class, |
| &sink_template_factory); |
| gst_element_class_set_static_metadata (element_class, |
| "mpeg1 and mpeg2 video decoder", "Codec/Decoder/Video", |
| "Uses libmpeg2 to decode MPEG video streams", |
| "Wim Taymans <wim.taymans@chello.be>"); |
| |
| video_decoder_class->open = GST_DEBUG_FUNCPTR (gst_mpeg2dec_open); |
| video_decoder_class->close = GST_DEBUG_FUNCPTR (gst_mpeg2dec_close); |
| video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_mpeg2dec_start); |
| video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_mpeg2dec_stop); |
| video_decoder_class->flush = GST_DEBUG_FUNCPTR (gst_mpeg2dec_flush); |
| video_decoder_class->set_format = GST_DEBUG_FUNCPTR (gst_mpeg2dec_set_format); |
| video_decoder_class->handle_frame = |
| GST_DEBUG_FUNCPTR (gst_mpeg2dec_handle_frame); |
| video_decoder_class->finish = GST_DEBUG_FUNCPTR (gst_mpeg2dec_finish); |
| video_decoder_class->decide_allocation = |
| GST_DEBUG_FUNCPTR (gst_mpeg2dec_decide_allocation); |
| |
| GST_DEBUG_CATEGORY_INIT (mpeg2dec_debug, "mpeg2dec", 0, |
| "MPEG-2 Video Decoder"); |
| GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE"); |
| } |
| |
| static void |
| gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec) |
| { |
| gst_video_decoder_set_packetized (GST_VIDEO_DECODER (mpeg2dec), TRUE); |
| gst_video_decoder_set_needs_format (GST_VIDEO_DECODER (mpeg2dec), TRUE); |
| gst_video_decoder_set_use_default_pad_acceptcaps (GST_VIDEO_DECODER_CAST |
| (mpeg2dec), TRUE); |
| GST_PAD_SET_ACCEPT_TEMPLATE (GST_VIDEO_DECODER_SINK_PAD (mpeg2dec)); |
| |
| /* initialize the mpeg2dec acceleration */ |
| } |
| |
| static void |
| gst_mpeg2dec_finalize (GObject * object) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (object); |
| |
| if (mpeg2dec->decoder) { |
| GST_DEBUG_OBJECT (mpeg2dec, "closing decoder"); |
| mpeg2_close (mpeg2dec->decoder); |
| mpeg2dec->decoder = NULL; |
| } |
| |
| gst_mpeg2dec_clear_buffers (mpeg2dec); |
| g_free (mpeg2dec->dummybuf[3]); |
| mpeg2dec->dummybuf[3] = NULL; |
| |
| G_OBJECT_CLASS (parent_class)->finalize (object); |
| } |
| |
| static gboolean |
| gst_mpeg2dec_open (GstVideoDecoder * decoder) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); |
| |
| mpeg2_accel (MPEG2_ACCEL_DETECT); |
| if ((mpeg2dec->decoder = mpeg2_init ()) == NULL) |
| return FALSE; |
| mpeg2dec->info = mpeg2_info (mpeg2dec->decoder); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_mpeg2dec_close (GstVideoDecoder * decoder) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); |
| |
| if (mpeg2dec->decoder) { |
| mpeg2_close (mpeg2dec->decoder); |
| mpeg2dec->decoder = NULL; |
| mpeg2dec->info = NULL; |
| } |
| gst_mpeg2dec_clear_buffers (mpeg2dec); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_mpeg2dec_set_format (GstVideoDecoder * decoder, GstVideoCodecState * state) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); |
| |
| /* Save input state to be used as reference for output state */ |
| if (mpeg2dec->input_state) |
| gst_video_codec_state_unref (mpeg2dec->input_state); |
| mpeg2dec->input_state = gst_video_codec_state_ref (state); |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_mpeg2dec_start (GstVideoDecoder * decoder) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); |
| |
| mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE; |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_mpeg2dec_stop (GstVideoDecoder * decoder) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); |
| |
| mpeg2_reset (mpeg2dec->decoder, 0); |
| mpeg2_skip (mpeg2dec->decoder, 1); |
| |
| gst_mpeg2dec_clear_buffers (mpeg2dec); |
| |
| if (mpeg2dec->input_state) |
| gst_video_codec_state_unref (mpeg2dec->input_state); |
| mpeg2dec->input_state = NULL; |
| |
| if (mpeg2dec->downstream_pool) { |
| gst_buffer_pool_set_active (mpeg2dec->downstream_pool, FALSE); |
| gst_object_unref (mpeg2dec->downstream_pool); |
| } |
| |
| return TRUE; |
| } |
| |
| static gboolean |
| gst_mpeg2dec_flush (GstVideoDecoder * decoder) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); |
| |
| /* reset the initial video state */ |
| mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE; |
| mpeg2_reset (mpeg2dec->decoder, 1); |
| mpeg2_skip (mpeg2dec->decoder, 1); |
| |
| gst_mpeg2dec_clear_buffers (mpeg2dec); |
| |
| if (mpeg2dec->downstream_pool) |
| gst_buffer_pool_set_active (mpeg2dec->downstream_pool, FALSE); |
| |
| return TRUE; |
| } |
| |
| static GstFlowReturn |
| gst_mpeg2dec_finish (GstVideoDecoder * decoder) |
| { |
| return GST_FLOW_OK; |
| } |
| |
| static GstBufferPool * |
| gst_mpeg2dec_create_generic_pool (GstAllocator * allocator, |
| GstAllocationParams * params, GstCaps * caps, guint size, guint min, |
| guint max, GstStructure ** out_config) |
| { |
| GstBufferPool *pool; |
| GstStructure *config; |
| |
| pool = gst_video_buffer_pool_new (); |
| config = gst_buffer_pool_get_config (pool); |
| |
| gst_buffer_pool_config_set_allocator (config, allocator, params); |
| gst_buffer_pool_config_set_params (config, caps, size, min, max); |
| gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META); |
| |
| *out_config = config; |
| return pool; |
| } |
| |
| static gboolean |
| gst_mpeg2dec_decide_allocation (GstVideoDecoder * decoder, GstQuery * query) |
| { |
| GstMpeg2dec *dec = GST_MPEG2DEC (decoder); |
| GstBufferPool *pool; |
| guint size, min, max; |
| GstStructure *config, *down_config = NULL; |
| GstAllocator *allocator; |
| GstAllocationParams params; |
| gboolean update_allocator; |
| gboolean has_videometa = FALSE; |
| GstCaps *caps; |
| |
| /* Get rid of ancient pool */ |
| if (dec->downstream_pool) { |
| gst_buffer_pool_set_active (dec->downstream_pool, FALSE); |
| gst_object_unref (dec->downstream_pool); |
| dec->downstream_pool = NULL; |
| } |
| |
| /* Get negotiated allocation caps */ |
| gst_query_parse_allocation (query, &caps, NULL); |
| |
| /* Set allocation parameters to guarantee 16-byte aligned output buffers */ |
| if (gst_query_get_n_allocation_params (query) > 0) { |
| gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms); |
| update_allocator = TRUE; |
| } else { |
| allocator = NULL; |
| gst_allocation_params_init (¶ms); |
| update_allocator = FALSE; |
| } |
| |
| params.align = MAX (params.align, 15); |
| |
| if (update_allocator) |
| gst_query_set_nth_allocation_param (query, 0, allocator, ¶ms); |
| else |
| gst_query_add_allocation_param (query, allocator, ¶ms); |
| |
| /* Now chain up to the parent class to guarantee that we can |
| * get a buffer pool from the query */ |
| if (!GST_VIDEO_DECODER_CLASS (parent_class)->decide_allocation (decoder, |
| query)) { |
| if (allocator) |
| gst_object_unref (allocator); |
| return FALSE; |
| } |
| |
| gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max); |
| |
| config = gst_buffer_pool_get_config (pool); |
| if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) { |
| gst_buffer_pool_config_add_option (config, |
| GST_BUFFER_POOL_OPTION_VIDEO_META); |
| has_videometa = TRUE; |
| } |
| |
| if (dec->need_alignment) { |
| /* If downstream does not support video meta, we will have to copy, keep |
| * the downstream pool to avoid double copying */ |
| if (!has_videometa) { |
| dec->downstream_pool = pool; |
| pool = NULL; |
| down_config = config; |
| config = NULL; |
| min = 2; |
| max = 0; |
| } |
| |
| /* In case downstream support video meta, but the downstream pool does not |
| * have alignment support, discard downstream pool and use video pool */ |
| else if (!gst_buffer_pool_has_option (pool, |
| GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT)) { |
| gst_object_unref (pool); |
| pool = NULL; |
| gst_structure_free (config); |
| config = NULL; |
| } |
| |
| if (!pool) |
| pool = gst_mpeg2dec_create_generic_pool (allocator, ¶ms, caps, size, |
| min, max, &config); |
| |
| gst_buffer_pool_config_add_option (config, |
| GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT); |
| gst_buffer_pool_config_set_video_alignment (config, &dec->valign); |
| } |
| |
| if (allocator) |
| gst_object_unref (allocator); |
| |
| /* If we are copying out, we'll need to setup and activate the other pool */ |
| if (dec->downstream_pool) { |
| if (!gst_buffer_pool_set_config (dec->downstream_pool, down_config)) { |
| down_config = gst_buffer_pool_get_config (dec->downstream_pool); |
| if (!gst_buffer_pool_config_validate_params (down_config, caps, size, min, |
| max)) { |
| gst_structure_free (down_config); |
| goto config_failed; |
| } |
| |
| if (!gst_buffer_pool_set_config (dec->downstream_pool, down_config)) |
| goto config_failed; |
| } |
| |
| if (!gst_buffer_pool_set_active (dec->downstream_pool, TRUE)) |
| goto activate_failed; |
| } |
| |
| /* Now configure the pool, if the pool had made some changes, it will |
| * return FALSE. Validate the changes ...*/ |
| if (!gst_buffer_pool_set_config (pool, config)) { |
| config = gst_buffer_pool_get_config (pool); |
| |
| /* Check basic params */ |
| if (!gst_buffer_pool_config_validate_params (config, caps, size, min, max)) { |
| gst_structure_free (config); |
| goto config_failed; |
| } |
| |
| /* If needed, check that resulting alignment is still valid */ |
| if (dec->need_alignment) { |
| GstVideoAlignment valign; |
| |
| if (!gst_buffer_pool_config_get_video_alignment (config, &valign)) { |
| gst_structure_free (config); |
| goto config_failed; |
| } |
| |
| if (valign.padding_left != 0 || valign.padding_top != 0 |
| || valign.padding_right < dec->valign.padding_right |
| || valign.padding_bottom < dec->valign.padding_bottom) { |
| gst_structure_free (config); |
| goto config_failed; |
| } |
| } |
| |
| if (!gst_buffer_pool_set_config (pool, config)) |
| goto config_failed; |
| } |
| |
| /* For external pools, we need to check strides */ |
| if (!GST_IS_VIDEO_BUFFER_POOL (pool) && has_videometa) { |
| GstBuffer *buffer; |
| const GstVideoFormatInfo *finfo; |
| GstVideoMeta *vmeta; |
| gint uv_stride; |
| |
| if (!gst_buffer_pool_set_active (pool, TRUE)) |
| goto activate_failed; |
| |
| if (gst_buffer_pool_acquire_buffer (pool, &buffer, NULL) != GST_FLOW_OK) { |
| gst_buffer_pool_set_active (pool, FALSE); |
| goto acquire_failed; |
| } |
| |
| vmeta = gst_buffer_get_video_meta (buffer); |
| finfo = gst_video_format_get_info (vmeta->format); |
| |
| /* Check that strides are compatible. In this case, we can scale the |
| * stride directly since all the pixel strides for the formats we support |
| * is 1 */ |
| uv_stride = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, 1, vmeta->stride[0]); |
| if (uv_stride != vmeta->stride[1] || uv_stride != vmeta->stride[2]) { |
| gst_buffer_pool_set_active (pool, FALSE); |
| gst_object_unref (pool); |
| |
| pool = gst_mpeg2dec_create_generic_pool (allocator, ¶ms, caps, size, |
| min, max, &config); |
| |
| if (dec->need_alignment) { |
| gst_buffer_pool_config_add_option (config, |
| GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT); |
| gst_buffer_pool_config_set_video_alignment (config, &dec->valign); |
| } |
| |
| /* Generic pool don't fail on _set_config() */ |
| gst_buffer_pool_set_config (pool, config); |
| } |
| |
| gst_buffer_unref (buffer); |
| } |
| |
| gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max); |
| gst_object_unref (pool); |
| |
| return TRUE; |
| |
| config_failed: |
| gst_object_unref (pool); |
| GST_ELEMENT_ERROR (dec, RESOURCE, SETTINGS, |
| ("Failed to configure buffer pool"), |
| ("Configuration is most likely invalid, please report this issue.")); |
| return FALSE; |
| |
| activate_failed: |
| gst_object_unref (pool); |
| GST_ELEMENT_ERROR (dec, RESOURCE, SETTINGS, |
| ("Failed to activate buffer pool"), (NULL)); |
| return FALSE; |
| |
| acquire_failed: |
| gst_object_unref (pool); |
| GST_ELEMENT_ERROR (dec, RESOURCE, SETTINGS, |
| ("Failed to acquire a buffer"), (NULL)); |
| return FALSE; |
| } |
| |
| static GstFlowReturn |
| gst_mpeg2dec_crop_buffer (GstMpeg2dec * dec, GstVideoCodecFrame * in_frame, |
| GstVideoFrame * input_vframe) |
| { |
| GstVideoCodecState *state; |
| GstVideoInfo *info; |
| GstVideoInfo *dinfo; |
| GstVideoFrame output_frame; |
| GstFlowReturn ret; |
| GstBuffer *buffer = NULL; |
| |
| state = gst_video_decoder_get_output_state (GST_VIDEO_DECODER (dec)); |
| info = &state->info; |
| dinfo = &dec->decoded_info; |
| |
| GST_CAT_LOG_OBJECT (CAT_PERFORMANCE, dec, |
| "Copying input buffer %ux%u (%" G_GSIZE_FORMAT ") to output buffer " |
| "%ux%u (%" G_GSIZE_FORMAT ")", dinfo->width, dinfo->height, |
| dinfo->size, info->width, info->height, info->size); |
| |
| ret = gst_buffer_pool_acquire_buffer (dec->downstream_pool, &buffer, NULL); |
| if (ret != GST_FLOW_OK) |
| goto beach; |
| |
| if (!gst_video_frame_map (&output_frame, info, buffer, GST_MAP_WRITE)) |
| goto map_fail; |
| |
| if (in_frame->output_buffer) |
| gst_buffer_unref (in_frame->output_buffer); |
| in_frame->output_buffer = buffer; |
| |
| if (!gst_video_frame_copy (&output_frame, input_vframe)) |
| goto copy_failed; |
| |
| gst_video_frame_unmap (&output_frame); |
| |
| GST_BUFFER_FLAGS (in_frame->output_buffer) = |
| GST_BUFFER_FLAGS (input_vframe->buffer); |
| |
| beach: |
| gst_video_codec_state_unref (state); |
| |
| return ret; |
| |
| map_fail: |
| { |
| GST_ERROR_OBJECT (dec, "Failed to map output frame"); |
| gst_video_codec_state_unref (state); |
| return GST_FLOW_ERROR; |
| } |
| |
| copy_failed: |
| { |
| GST_ERROR_OBJECT (dec, "Failed to copy output frame"); |
| gst_video_frame_unmap (&output_frame); |
| gst_video_codec_state_unref (state); |
| return GST_FLOW_ERROR; |
| } |
| } |
| |
| typedef struct |
| { |
| gint id; |
| GstVideoFrame frame; |
| } GstMpeg2DecBuffer; |
| |
| static void |
| gst_mpeg2dec_clear_buffers (GstMpeg2dec * mpeg2dec) |
| { |
| GList *l; |
| while ((l = g_list_first (mpeg2dec->buffers))) { |
| GstMpeg2DecBuffer *mbuf = l->data; |
| gst_video_frame_unmap (&mbuf->frame); |
| g_slice_free (GstMpeg2DecBuffer, mbuf); |
| mpeg2dec->buffers = g_list_delete_link (mpeg2dec->buffers, l); |
| } |
| } |
| |
| static void |
| gst_mpeg2dec_save_buffer (GstMpeg2dec * mpeg2dec, gint id, |
| GstVideoFrame * frame) |
| { |
| GstMpeg2DecBuffer *mbuf; |
| |
| GST_LOG_OBJECT (mpeg2dec, "Saving local info for frame %d", id); |
| |
| mbuf = g_slice_new0 (GstMpeg2DecBuffer); |
| mbuf->id = id; |
| mbuf->frame = *frame; |
| |
| mpeg2dec->buffers = g_list_prepend (mpeg2dec->buffers, mbuf); |
| } |
| |
| static gint |
| gst_mpeg2dec_buffer_compare (GstMpeg2DecBuffer * mbuf, gconstpointer id) |
| { |
| if (mbuf->id == GPOINTER_TO_INT (id)) |
| return 0; |
| return -1; |
| } |
| |
| static void |
| gst_mpeg2dec_discard_buffer (GstMpeg2dec * mpeg2dec, gint id) |
| { |
| GList *l = g_list_find_custom (mpeg2dec->buffers, GINT_TO_POINTER (id), |
| (GCompareFunc) gst_mpeg2dec_buffer_compare); |
| |
| if (l) { |
| GstMpeg2DecBuffer *mbuf = l->data; |
| gst_video_frame_unmap (&mbuf->frame); |
| g_slice_free (GstMpeg2DecBuffer, mbuf); |
| mpeg2dec->buffers = g_list_delete_link (mpeg2dec->buffers, l); |
| GST_LOG_OBJECT (mpeg2dec, "Discarded local info for frame %d", id); |
| } else { |
| GST_WARNING ("Could not find buffer %d, will be leaked until next reset", |
| id); |
| } |
| } |
| |
| static GstVideoFrame * |
| gst_mpeg2dec_get_buffer (GstMpeg2dec * mpeg2dec, gint id) |
| { |
| GList *l = g_list_find_custom (mpeg2dec->buffers, GINT_TO_POINTER (id), |
| (GCompareFunc) gst_mpeg2dec_buffer_compare); |
| |
| if (l) { |
| GstMpeg2DecBuffer *mbuf = l->data; |
| return &mbuf->frame; |
| } |
| |
| return NULL; |
| } |
| |
| static void |
| init_dummybuf (GstMpeg2dec * mpeg2dec) |
| { |
| g_free (mpeg2dec->dummybuf[3]); |
| |
| /* libmpeg2 needs 16 byte aligned buffers... care for this here */ |
| mpeg2dec->dummybuf[3] = g_malloc0 (mpeg2dec->decoded_info.size + 15); |
| mpeg2dec->dummybuf[0] = ALIGN_16 (mpeg2dec->dummybuf[3]); |
| mpeg2dec->dummybuf[1] = |
| mpeg2dec->dummybuf[0] + |
| GST_VIDEO_INFO_PLANE_OFFSET (&mpeg2dec->decoded_info, 1); |
| mpeg2dec->dummybuf[2] = |
| mpeg2dec->dummybuf[0] + |
| GST_VIDEO_INFO_PLANE_OFFSET (&mpeg2dec->decoded_info, 2); |
| } |
| |
| static GstFlowReturn |
| handle_sequence (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info) |
| { |
| GstFlowReturn ret = GST_FLOW_OK; |
| GstClockTime latency; |
| const mpeg2_sequence_t *sequence; |
| GstVideoCodecState *state; |
| GstVideoInfo *vinfo; |
| GstVideoFormat format; |
| |
| sequence = info->sequence; |
| |
| if (sequence->frame_period == 0) |
| goto invalid_frame_period; |
| |
| /* mpeg2 video can only be from 16x16 to 4096x4096. Everything |
| * else is a corrupted file */ |
| if (sequence->width > 4096 || sequence->width < 16 || |
| sequence->height > 4096 || sequence->height < 16) |
| goto invalid_size; |
| |
| GST_DEBUG_OBJECT (mpeg2dec, |
| "widthxheight: %dx%d , decoded_widthxheight: %dx%d", |
| sequence->picture_width, sequence->picture_height, sequence->width, |
| sequence->height); |
| |
| gst_video_alignment_reset (&mpeg2dec->valign); |
| |
| if (sequence->picture_width < sequence->width || |
| sequence->picture_height < sequence->height) { |
| GST_DEBUG_OBJECT (mpeg2dec, "we need to crop"); |
| mpeg2dec->valign.padding_right = sequence->width - sequence->picture_width; |
| mpeg2dec->valign.padding_bottom = |
| sequence->height - sequence->picture_height; |
| mpeg2dec->need_alignment = TRUE; |
| } else if (sequence->picture_width == sequence->width || |
| sequence->picture_height == sequence->height) { |
| GST_DEBUG_OBJECT (mpeg2dec, "no cropping needed"); |
| mpeg2dec->need_alignment = FALSE; |
| } else { |
| goto invalid_picture; |
| } |
| |
| /* get subsampling */ |
| if (sequence->chroma_width < sequence->width) { |
| /* horizontally subsampled */ |
| if (sequence->chroma_height < sequence->height) { |
| /* and vertically subsamples */ |
| format = GST_VIDEO_FORMAT_I420; |
| } else { |
| format = GST_VIDEO_FORMAT_Y42B; |
| } |
| } else { |
| /* not subsampled */ |
| format = GST_VIDEO_FORMAT_Y444; |
| } |
| |
| state = gst_video_decoder_set_output_state (GST_VIDEO_DECODER (mpeg2dec), |
| format, sequence->picture_width, sequence->picture_height, |
| mpeg2dec->input_state); |
| vinfo = &state->info; |
| |
| /* If we don't have a valid upstream PAR override it */ |
| if (GST_VIDEO_INFO_PAR_N (vinfo) == 1 && |
| GST_VIDEO_INFO_PAR_D (vinfo) == 1 && |
| sequence->pixel_width != 0 && sequence->pixel_height != 0) { |
| guint pixel_width, pixel_height; |
| |
| if (mpeg2_guess_aspect (sequence, &pixel_width, &pixel_height)) { |
| vinfo->par_n = pixel_width; |
| vinfo->par_d = pixel_height; |
| } |
| GST_DEBUG_OBJECT (mpeg2dec, "Setting PAR %d x %d", |
| vinfo->par_n, vinfo->par_d); |
| } |
| vinfo->fps_n = 27000000; |
| vinfo->fps_d = sequence->frame_period; |
| |
| if (!(sequence->flags & SEQ_FLAG_PROGRESSIVE_SEQUENCE)) |
| vinfo->interlace_mode = GST_VIDEO_INTERLACE_MODE_MIXED; |
| else |
| vinfo->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE; |
| |
| vinfo->chroma_site = GST_VIDEO_CHROMA_SITE_MPEG2; |
| vinfo->colorimetry.range = GST_VIDEO_COLOR_RANGE_16_235; |
| |
| if (sequence->flags & SEQ_FLAG_COLOUR_DESCRIPTION) { |
| /* do color description */ |
| switch (sequence->colour_primaries) { |
| case 1: |
| vinfo->colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_BT709; |
| break; |
| case 4: |
| vinfo->colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M; |
| break; |
| case 5: |
| vinfo->colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG; |
| break; |
| case 6: |
| vinfo->colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M; |
| break; |
| case 7: |
| vinfo->colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE240M; |
| break; |
| /* 0 forbidden */ |
| /* 2 unspecified */ |
| /* 3 reserved */ |
| /* 8-255 reseved */ |
| default: |
| vinfo->colorimetry.primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN; |
| break; |
| } |
| /* matrix coefficients */ |
| switch (sequence->matrix_coefficients) { |
| case 1: |
| vinfo->colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_BT709; |
| break; |
| case 4: |
| vinfo->colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_FCC; |
| break; |
| case 5: |
| case 6: |
| vinfo->colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_BT601; |
| break; |
| case 7: |
| vinfo->colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M; |
| break; |
| /* 0 forbidden */ |
| /* 2 unspecified */ |
| /* 3 reserved */ |
| /* 8-255 reseved */ |
| default: |
| vinfo->colorimetry.matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN; |
| break; |
| } |
| /* transfer characteristics */ |
| switch (sequence->transfer_characteristics) { |
| case 1: |
| vinfo->colorimetry.transfer = GST_VIDEO_TRANSFER_BT709; |
| break; |
| case 4: |
| vinfo->colorimetry.transfer = GST_VIDEO_TRANSFER_GAMMA22; |
| break; |
| case 5: |
| vinfo->colorimetry.transfer = GST_VIDEO_TRANSFER_GAMMA28; |
| break; |
| case 6: |
| vinfo->colorimetry.transfer = GST_VIDEO_TRANSFER_BT709; |
| break; |
| case 7: |
| vinfo->colorimetry.transfer = GST_VIDEO_TRANSFER_SMPTE240M; |
| break; |
| case 8: |
| vinfo->colorimetry.transfer = GST_VIDEO_TRANSFER_GAMMA10; |
| break; |
| /* 0 forbidden */ |
| /* 2 unspecified */ |
| /* 3 reserved */ |
| /* 9-255 reseved */ |
| default: |
| vinfo->colorimetry.transfer = GST_VIDEO_TRANSFER_UNKNOWN; |
| break; |
| } |
| } |
| |
| GST_DEBUG_OBJECT (mpeg2dec, |
| "sequence flags: %d, frame period: %d, frame rate: %d/%d", |
| sequence->flags, sequence->frame_period, vinfo->fps_n, vinfo->fps_d); |
| GST_DEBUG_OBJECT (mpeg2dec, "profile: %02x, colour_primaries: %d", |
| sequence->profile_level_id, sequence->colour_primaries); |
| GST_DEBUG_OBJECT (mpeg2dec, "transfer chars: %d, matrix coef: %d", |
| sequence->transfer_characteristics, sequence->matrix_coefficients); |
| GST_DEBUG_OBJECT (mpeg2dec, |
| "FLAGS: CONSTRAINED_PARAMETERS:%d, PROGRESSIVE_SEQUENCE:%d", |
| sequence->flags & SEQ_FLAG_CONSTRAINED_PARAMETERS, |
| sequence->flags & SEQ_FLAG_PROGRESSIVE_SEQUENCE); |
| GST_DEBUG_OBJECT (mpeg2dec, "FLAGS: LOW_DELAY:%d, COLOUR_DESCRIPTION:%d", |
| sequence->flags & SEQ_FLAG_LOW_DELAY, |
| sequence->flags & SEQ_FLAG_COLOUR_DESCRIPTION); |
| |
| /* Save the padded video information */ |
| mpeg2dec->decoded_info = *vinfo; |
| gst_video_info_align (&mpeg2dec->decoded_info, &mpeg2dec->valign); |
| |
| /* Mpeg2dec has 2 frame latency to produce a picture and 1 frame latency in |
| * it's parser */ |
| latency = gst_util_uint64_scale (3 * GST_SECOND, vinfo->fps_d, vinfo->fps_n); |
| gst_video_decoder_set_latency (GST_VIDEO_DECODER (mpeg2dec), latency, |
| latency); |
| |
| if (!gst_video_decoder_negotiate (GST_VIDEO_DECODER (mpeg2dec))) |
| goto negotiation_fail; |
| |
| gst_video_codec_state_unref (state); |
| |
| mpeg2_custom_fbuf (mpeg2dec->decoder, 1); |
| |
| init_dummybuf (mpeg2dec); |
| |
| /* Pump in some null buffers, because otherwise libmpeg2 doesn't |
| * initialise the discard_fbuf->id */ |
| mpeg2_set_buf (mpeg2dec->decoder, mpeg2dec->dummybuf, NULL); |
| mpeg2_set_buf (mpeg2dec->decoder, mpeg2dec->dummybuf, NULL); |
| mpeg2_set_buf (mpeg2dec->decoder, mpeg2dec->dummybuf, NULL); |
| gst_mpeg2dec_clear_buffers (mpeg2dec); |
| |
| return ret; |
| |
| invalid_frame_period: |
| { |
| GST_WARNING_OBJECT (mpeg2dec, "Frame period is 0!"); |
| return GST_FLOW_ERROR; |
| } |
| invalid_size: |
| { |
| GST_ERROR_OBJECT (mpeg2dec, "Invalid frame dimensions: %d x %d", |
| sequence->width, sequence->height); |
| return GST_FLOW_ERROR; |
| } |
| |
| invalid_picture: |
| { |
| GST_ERROR_OBJECT (mpeg2dec, "Picture dimension bigger then frame: " |
| "%d x %d is bigger then %d x %d", sequence->picture_width, |
| sequence->picture_height, sequence->width, sequence->height); |
| return GST_FLOW_ERROR; |
| } |
| |
| |
| negotiation_fail: |
| { |
| GST_WARNING_OBJECT (mpeg2dec, "Failed to negotiate with downstream"); |
| gst_video_codec_state_unref (state); |
| return GST_FLOW_ERROR; |
| } |
| } |
| |
| static GstFlowReturn |
| handle_picture (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info, |
| GstVideoCodecFrame * frame) |
| { |
| GstVideoDecoder *decoder = (GstVideoDecoder *) mpeg2dec; |
| GstFlowReturn ret; |
| gint type; |
| const gchar *type_str = NULL; |
| gboolean key_frame = FALSE; |
| const mpeg2_picture_t *picture = info->current_picture; |
| GstVideoFrame vframe; |
| guint8 *buf[3]; |
| |
| ret = gst_video_decoder_allocate_output_frame (decoder, frame); |
| if (ret != GST_FLOW_OK) |
| return ret; |
| |
| type = picture->flags & PIC_MASK_CODING_TYPE; |
| switch (type) { |
| case PIC_FLAG_CODING_TYPE_I: |
| key_frame = TRUE; |
| mpeg2_skip (mpeg2dec->decoder, 0); |
| type_str = "I"; |
| break; |
| case PIC_FLAG_CODING_TYPE_P: |
| type_str = "P"; |
| break; |
| case PIC_FLAG_CODING_TYPE_B: |
| type_str = "B"; |
| break; |
| default: |
| gst_video_codec_frame_ref (frame); |
| ret = gst_video_decoder_drop_frame (GST_VIDEO_DECODER (mpeg2dec), frame); |
| GST_VIDEO_DECODER_ERROR (mpeg2dec, 1, STREAM, DECODE, |
| ("decoding error"), ("Invalid picture type"), ret); |
| return ret; |
| } |
| |
| GST_DEBUG_OBJECT (mpeg2dec, "handle picture type %s", type_str); |
| GST_DEBUG_OBJECT (mpeg2dec, "picture %s, frame %i", |
| key_frame ? ", kf," : " ", frame->system_frame_number); |
| |
| if (GST_VIDEO_INFO_IS_INTERLACED (&mpeg2dec->decoded_info)) { |
| /* This implies SEQ_FLAG_PROGRESSIVE_SEQUENCE is not set */ |
| if (picture->flags & PIC_FLAG_TOP_FIELD_FIRST) { |
| GST_BUFFER_FLAG_SET (frame->output_buffer, GST_VIDEO_BUFFER_FLAG_TFF); |
| } |
| if (!(picture->flags & PIC_FLAG_PROGRESSIVE_FRAME)) { |
| GST_BUFFER_FLAG_SET (frame->output_buffer, |
| GST_VIDEO_BUFFER_FLAG_INTERLACED); |
| } |
| if (picture->flags & PIC_FLAG_REPEAT_FIRST_FIELD) { |
| GST_BUFFER_FLAG_SET (frame->output_buffer, GST_VIDEO_BUFFER_FLAG_RFF); |
| } |
| } |
| |
| if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_PICTURE && key_frame) { |
| mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_KEYFRAME; |
| } |
| |
| GST_DEBUG_OBJECT (mpeg2dec, |
| "picture: %s %s %s %s %s fields:%d ts:%" |
| GST_TIME_FORMAT, |
| (picture->flags & PIC_FLAG_PROGRESSIVE_FRAME ? "prog" : " "), |
| (picture->flags & PIC_FLAG_TOP_FIELD_FIRST ? "tff" : " "), |
| (picture->flags & PIC_FLAG_REPEAT_FIRST_FIELD ? "rff" : " "), |
| (picture->flags & PIC_FLAG_SKIP ? "skip" : " "), |
| (picture->flags & PIC_FLAG_COMPOSITE_DISPLAY ? "composite" : " "), |
| picture->nb_fields, GST_TIME_ARGS (frame->pts)); |
| |
| if (!gst_video_frame_map (&vframe, &mpeg2dec->decoded_info, |
| frame->output_buffer, GST_MAP_READ | GST_MAP_WRITE)) |
| goto map_fail; |
| |
| buf[0] = GST_VIDEO_FRAME_PLANE_DATA (&vframe, 0); |
| buf[1] = GST_VIDEO_FRAME_PLANE_DATA (&vframe, 1); |
| buf[2] = GST_VIDEO_FRAME_PLANE_DATA (&vframe, 2); |
| |
| GST_DEBUG_OBJECT (mpeg2dec, "set_buf: %p %p %p, frame %i", |
| buf[0], buf[1], buf[2], frame->system_frame_number); |
| |
| /* Note: We use a non-null 'id' value to make the distinction |
| * between the dummy buffers (which have an id of NULL) and the |
| * ones we did */ |
| mpeg2_stride (mpeg2dec->decoder, vframe.info.stride[0]); |
| mpeg2_set_buf (mpeg2dec->decoder, buf, |
| GINT_TO_POINTER (frame->system_frame_number + 1)); |
| gst_mpeg2dec_save_buffer (mpeg2dec, frame->system_frame_number, &vframe); |
| |
| return ret; |
| |
| map_fail: |
| { |
| GST_ELEMENT_ERROR (mpeg2dec, RESOURCE, WRITE, ("Failed to map frame"), |
| (NULL)); |
| return GST_FLOW_ERROR; |
| } |
| } |
| |
| static GstFlowReturn |
| handle_slice (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info) |
| { |
| GstFlowReturn ret = GST_FLOW_OK; |
| GstVideoCodecFrame *frame; |
| const mpeg2_picture_t *picture; |
| gboolean key_frame = FALSE; |
| |
| GST_DEBUG_OBJECT (mpeg2dec, |
| "fbuf:%p display_picture:%p current_picture:%p fbuf->id:%d", |
| info->display_fbuf, info->display_picture, info->current_picture, |
| GPOINTER_TO_INT (info->display_fbuf->id) - 1); |
| |
| /* Note, the fbuf-id is shifted by 1 to make the difference between |
| * NULL values (used by dummy buffers) and 'real' values */ |
| frame = gst_video_decoder_get_frame (GST_VIDEO_DECODER (mpeg2dec), |
| GPOINTER_TO_INT (info->display_fbuf->id) - 1); |
| if (!frame) |
| goto no_frame; |
| picture = info->display_picture; |
| key_frame = (picture->flags & PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_I; |
| |
| GST_DEBUG_OBJECT (mpeg2dec, "picture flags: %d, type: %d, keyframe: %d", |
| picture->flags, picture->flags & PIC_MASK_CODING_TYPE, key_frame); |
| |
| if (key_frame) { |
| mpeg2_skip (mpeg2dec->decoder, 0); |
| } |
| |
| if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_KEYFRAME && key_frame) |
| mpeg2dec->discont_state = MPEG2DEC_DISC_NONE; |
| |
| if (picture->flags & PIC_FLAG_SKIP) { |
| GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer because of skip flag"); |
| ret = gst_video_decoder_drop_frame (GST_VIDEO_DECODER (mpeg2dec), frame); |
| mpeg2_skip (mpeg2dec->decoder, 1); |
| return ret; |
| } |
| |
| if (mpeg2dec->discont_state != MPEG2DEC_DISC_NONE) { |
| GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer, discont state %d", |
| mpeg2dec->discont_state); |
| ret = gst_video_decoder_drop_frame (GST_VIDEO_DECODER (mpeg2dec), frame); |
| return ret; |
| } |
| |
| /* do cropping if the target region is smaller than the input one */ |
| if (mpeg2dec->downstream_pool) { |
| GstVideoFrame *vframe; |
| |
| if (gst_video_decoder_get_max_decode_time (GST_VIDEO_DECODER (mpeg2dec), |
| frame) < 0) { |
| GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer crop, too late"); |
| return gst_video_decoder_drop_frame (GST_VIDEO_DECODER (mpeg2dec), frame); |
| } |
| |
| GST_DEBUG_OBJECT (mpeg2dec, "Doing a crop copy of the decoded buffer"); |
| |
| vframe = gst_mpeg2dec_get_buffer (mpeg2dec, frame->system_frame_number); |
| g_assert (vframe != NULL); |
| ret = gst_mpeg2dec_crop_buffer (mpeg2dec, frame, vframe); |
| |
| if (ret != GST_FLOW_OK) { |
| gst_video_decoder_drop_frame (GST_VIDEO_DECODER (mpeg2dec), frame); |
| return ret; |
| } |
| } |
| |
| ret = gst_video_decoder_finish_frame (GST_VIDEO_DECODER (mpeg2dec), frame); |
| |
| return ret; |
| |
| no_frame: |
| { |
| GST_DEBUG ("display buffer does not have a valid frame"); |
| return GST_FLOW_OK; |
| } |
| } |
| |
| static GstFlowReturn |
| gst_mpeg2dec_handle_frame (GstVideoDecoder * decoder, |
| GstVideoCodecFrame * frame) |
| { |
| GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); |
| GstBuffer *buf = frame->input_buffer; |
| GstMapInfo minfo; |
| const mpeg2_info_t *info; |
| mpeg2_state_t state; |
| gboolean done = FALSE; |
| GstFlowReturn ret = GST_FLOW_OK; |
| |
| GST_LOG_OBJECT (mpeg2dec, "received frame %d, timestamp %" |
| GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT, |
| frame->system_frame_number, |
| GST_TIME_ARGS (frame->pts), GST_TIME_ARGS (frame->duration)); |
| |
| gst_buffer_ref (buf); |
| if (!gst_buffer_map (buf, &minfo, GST_MAP_READ)) { |
| GST_ERROR_OBJECT (mpeg2dec, "Failed to map input buffer"); |
| gst_buffer_unref (buf); |
| return GST_FLOW_ERROR; |
| } |
| |
| info = mpeg2dec->info; |
| |
| GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer"); |
| mpeg2_buffer (mpeg2dec->decoder, minfo.data, minfo.data + minfo.size); |
| GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer done"); |
| |
| while (!done) { |
| GST_LOG_OBJECT (mpeg2dec, "calling parse"); |
| state = mpeg2_parse (mpeg2dec->decoder); |
| GST_DEBUG_OBJECT (mpeg2dec, "parse state %d", state); |
| |
| switch (state) { |
| case STATE_SEQUENCE_MODIFIED: |
| GST_DEBUG_OBJECT (mpeg2dec, "sequence modified"); |
| mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE; |
| gst_mpeg2dec_clear_buffers (mpeg2dec); |
| /* fall through */ |
| case STATE_SEQUENCE: |
| ret = handle_sequence (mpeg2dec, info); |
| /* if there is an error handling the sequence |
| * reset the decoder, maybe something more elegant |
| * could be done. |
| */ |
| if (ret == GST_FLOW_ERROR) { |
| GST_VIDEO_DECODER_ERROR (decoder, 1, STREAM, DECODE, |
| ("decoding error"), ("Bad sequence header"), ret); |
| gst_video_decoder_drop_frame (decoder, frame); |
| gst_mpeg2dec_flush (decoder); |
| goto done; |
| } |
| break; |
| case STATE_SEQUENCE_REPEATED: |
| GST_DEBUG_OBJECT (mpeg2dec, "sequence repeated"); |
| break; |
| case STATE_GOP: |
| GST_DEBUG_OBJECT (mpeg2dec, "gop"); |
| break; |
| case STATE_PICTURE: |
| ret = handle_picture (mpeg2dec, info, frame); |
| break; |
| case STATE_SLICE_1ST: |
| GST_LOG_OBJECT (mpeg2dec, "1st slice of frame encountered"); |
| break; |
| case STATE_PICTURE_2ND: |
| GST_LOG_OBJECT (mpeg2dec, |
| "Second picture header encountered. Decoding 2nd field"); |
| break; |
| case STATE_INVALID_END: |
| GST_DEBUG_OBJECT (mpeg2dec, "invalid end"); |
| case STATE_END: |
| GST_DEBUG_OBJECT (mpeg2dec, "end"); |
| case STATE_SLICE: |
| GST_DEBUG_OBJECT (mpeg2dec, "display_fbuf:%p, discard_fbuf:%p", |
| info->display_fbuf, info->discard_fbuf); |
| if (info->display_fbuf && info->display_fbuf->id) { |
| ret = handle_slice (mpeg2dec, info); |
| } else { |
| GST_DEBUG_OBJECT (mpeg2dec, "no picture to display"); |
| } |
| if (info->discard_fbuf && info->discard_fbuf->id) |
| gst_mpeg2dec_discard_buffer (mpeg2dec, |
| GPOINTER_TO_INT (info->discard_fbuf->id) - 1); |
| if (state != STATE_SLICE) { |
| gst_mpeg2dec_clear_buffers (mpeg2dec); |
| } |
| break; |
| case STATE_BUFFER: |
| done = TRUE; |
| break; |
| /* error */ |
| case STATE_INVALID: |
| GST_VIDEO_DECODER_ERROR (decoder, 1, STREAM, DECODE, |
| ("decoding error"), ("Reached libmpeg2 invalid state"), ret); |
| continue; |
| default: |
| GST_ERROR_OBJECT (mpeg2dec, "Unknown libmpeg2 state %d, FIXME", state); |
| ret = GST_FLOW_OK; |
| gst_video_codec_frame_unref (frame); |
| goto done; |
| } |
| |
| if (ret != GST_FLOW_OK) { |
| GST_DEBUG_OBJECT (mpeg2dec, "exit loop, reason %s", |
| gst_flow_get_name (ret)); |
| break; |
| } |
| } |
| |
| gst_video_codec_frame_unref (frame); |
| |
| done: |
| gst_buffer_unmap (buf, &minfo); |
| gst_buffer_unref (buf); |
| return ret; |
| } |
| |
| static gboolean |
| plugin_init (GstPlugin * plugin) |
| { |
| if (!gst_element_register (plugin, "mpeg2dec", GST_RANK_SECONDARY, |
| GST_TYPE_MPEG2DEC)) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, |
| GST_VERSION_MINOR, |
| mpeg2dec, |
| "LibMpeg2 decoder", plugin_init, VERSION, "GPL", GST_PACKAGE_NAME, |
| GST_PACKAGE_ORIGIN); |