static int vp3_decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size) { Vp3DecodeContext *s = avctx->priv_data; GetBitContext gb; static int counter = 0; int i; init_get_bits(&gb, buf, buf_size * 8); if (s->theora && get_bits1(&gb)) { av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n"); return -1; } s->keyframe = !get_bits1(&gb); if (!s->theora) skip_bits(&gb, 1); s->last_quality_index = s->quality_index; s->nqis=0; do{ s->qis[s->nqis++]= get_bits(&gb, 6); } while(s->theora >= 0x030200 && s->nqis<3 && get_bits1(&gb)); s->quality_index= s->qis[0]; if (s->avctx->debug & FF_DEBUG_PICT_INFO) av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n", s->keyframe?"key":"", counter, s->quality_index); counter++; if (s->quality_index != s->last_quality_index) { init_dequantizer(s); init_loop_filter(s); } if (s->keyframe) { if (!s->theora) { skip_bits(&gb, 4); /* width code */ skip_bits(&gb, 4); /* height code */ if (s->version) { s->version = get_bits(&gb, 5); if (counter == 1) av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version); } } if (s->version || s->theora) { if (get_bits1(&gb)) av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n"); skip_bits(&gb, 2); /* reserved? */ } if (s->last_frame.data[0] == s->golden_frame.data[0]) { if (s->golden_frame.data[0]) avctx->release_buffer(avctx, &s->golden_frame); s->last_frame= s->golden_frame; /* ensure that we catch any access to this released frame */ } else { if (s->golden_frame.data[0]) avctx->release_buffer(avctx, &s->golden_frame); if (s->last_frame.data[0]) avctx->release_buffer(avctx, &s->last_frame); } s->golden_frame.reference = 3; if(avctx->get_buffer(avctx, &s->golden_frame) < 0) { av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n"); return -1; } /* golden frame is also the current frame */ s->current_frame= s->golden_frame; /* time to figure out pixel addresses? */ if (!s->pixel_addresses_inited) { if (!s->flipped_image) vp3_calculate_pixel_addresses(s); else theora_calculate_pixel_addresses(s); s->pixel_addresses_inited = 1; } } else { /* allocate a new current frame */ s->current_frame.reference = 3; if (!s->pixel_addresses_inited) { av_log(s->avctx, AV_LOG_ERROR, "vp3: first frame not a keyframe\n"); return -1; } if(avctx->get_buffer(avctx, &s->current_frame) < 0) { av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n"); return -1; } } s->current_frame.qscale_table= s->qscale_table; //FIXME allocate individual tables per AVFrame s->current_frame.qstride= 0; {START_TIMER init_frame(s, &gb); STOP_TIMER("init_frame")} #if KEYFRAMES_ONLY if (!s->keyframe) { memcpy(s->current_frame.data[0], s->golden_frame.data[0], s->current_frame.linesize[0] * s->height); memcpy(s->current_frame.data[1], s->golden_frame.data[1], s->current_frame.linesize[1] * s->height / 2); memcpy(s->current_frame.data[2], s->golden_frame.data[2], s->current_frame.linesize[2] * s->height / 2); } else { #endif {START_TIMER if (unpack_superblocks(s, &gb)){ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_superblocks\n"); return -1; } STOP_TIMER("unpack_superblocks")} {START_TIMER if (unpack_modes(s, &gb)){ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_modes\n"); return -1; } STOP_TIMER("unpack_modes")} {START_TIMER if (unpack_vectors(s, &gb)){ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_vectors\n"); return -1; } STOP_TIMER("unpack_vectors")} {START_TIMER if (unpack_dct_coeffs(s, &gb)){ av_log(s->avctx, AV_LOG_ERROR, "error in unpack_dct_coeffs\n"); return -1; } STOP_TIMER("unpack_dct_coeffs")} {START_TIMER reverse_dc_prediction(s, 0, s->fragment_width, s->fragment_height); if ((avctx->flags & CODEC_FLAG_GRAY) == 0) { reverse_dc_prediction(s, s->fragment_start[1], s->fragment_width / 2, s->fragment_height / 2); reverse_dc_prediction(s, s->fragment_start[2], s->fragment_width / 2, s->fragment_height / 2); } STOP_TIMER("reverse_dc_prediction")} {START_TIMER for (i = 0; i < s->macroblock_height; i++) render_slice(s, i); STOP_TIMER("render_fragments")} {START_TIMER apply_loop_filter(s); STOP_TIMER("apply_loop_filter")} #if KEYFRAMES_ONLY } #endif *data_size=sizeof(AVFrame); *(AVFrame*)data= s->current_frame; /* release the last frame, if it is allocated and if it is not the * golden frame */ if ((s->last_frame.data[0]) && (s->last_frame.data[0] != s->golden_frame.data[0])) avctx->release_buffer(avctx, &s->last_frame); /* shuffle frames (last = current) */ s->last_frame= s->current_frame; s->current_frame.data[0]= NULL; /* ensure that we catch any access to this released frame */ return buf_size; }
static int vp3_decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size) { Vp3DecodeContext *s = avctx->priv_data; GetBitContext gb; static int counter = 0; int i; init_get_bits(&gb, buf, buf_size * 8); if (s->theora && get_bits1(&gb)) { av_log(avctx, AV_LOG_ERROR, "Header packet passed to frame decoder, skipping\n"); return -1; } s->keyframe = !get_bits1(&gb); if (!s->theora) skip_bits(&gb, 1); s->last_quality_index = s->quality_index; s->nqis=0; do{ s->qis[s->nqis++]= get_bits(&gb, 6); } while(s->theora >= 0x030200 && s->nqis<3 && get_bits1(&gb)); s->quality_index= s->qis[0]; if (s->avctx->debug & FF_DEBUG_PICT_INFO) av_log(s->avctx, AV_LOG_INFO, " VP3 %sframe #%d: Q index = %d\n", s->keyframe?"key":"", counter, s->quality_index); counter++; if (s->quality_index != s->last_quality_index) { init_dequantizer(s); init_loop_filter(s); } if (s->keyframe) { if (!s->theora) { skip_bits(&gb, 4);   skip_bits(&gb, 4);   if (s->version) { s->version = get_bits(&gb, 5); if (counter == 1) av_log(s->avctx, AV_LOG_DEBUG, "VP version: %d\n", s->version); } } if (s->version || s->theora) { if (get_bits1(&gb)) av_log(s->avctx, AV_LOG_ERROR, "Warning, unsupported keyframe coding type?!\n"); skip_bits(&gb, 2);   } if (s->last_frame.data[0] == s->golden_frame.data[0]) { if (s->golden_frame.data[0]) avctx->release_buffer(avctx, &s->golden_frame); s->last_frame= s->golden_frame;   } else { if (s->golden_frame.data[0]) avctx->release_buffer(avctx, &s->golden_frame); if (s->last_frame.data[0]) avctx->release_buffer(avctx, &s->last_frame); } s->golden_frame.reference = 3; if(avctx->get_buffer(avctx, &s->golden_frame) < 0) { av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n"); return -1; }   s->current_frame= s->golden_frame;   if (!s->pixel_addresses_inited) { if (!s->flipped_image) vp3_calculate_pixel_addresses(s); else theora_calculate_pixel_addresses(s); s->pixel_addresses_inited = 1; } } else {   s->current_frame.reference = 3; if (!s->pixel_addresses_inited) { av_log(s->avctx, AV_LOG_ERROR, "vp3: first frame not a keyframe\n"); return -1; } if(avctx->get_buffer(avctx, &s->current_frame) < 0) { av_log(s->avctx, AV_LOG_ERROR, "vp3: get_buffer() failed\n"); return -1; } } s->current_frame.qscale_table= s->qscale_table;  