int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx) { int i, ret; Picture *pic; s->mb_skipped = 0; /* mark & release old frames */ if (s->pict_type != AV_PICTURE_TYPE_B && s->last_picture_ptr && s->last_picture_ptr != s->next_picture_ptr && s->last_picture_ptr->f->buf[0]) { ff_mpeg_unref_picture(s->avctx, s->last_picture_ptr); } /* release forgotten pictures */ /* if (MPEG-124 / H.263) */ for (i = 0; i < MAX_PICTURE_COUNT; i++) { if (&s->picture[i] != s->last_picture_ptr && &s->picture[i] != s->next_picture_ptr && s->picture[i].reference && !s->picture[i].needs_realloc) { ff_mpeg_unref_picture(s->avctx, &s->picture[i]); } } ff_mpeg_unref_picture(s->avctx, &s->current_picture); /* release non reference frames */ for (i = 0; i < MAX_PICTURE_COUNT; i++) { if (!s->picture[i].reference) ff_mpeg_unref_picture(s->avctx, &s->picture[i]); } if (s->current_picture_ptr && !s->current_picture_ptr->f->buf[0]) { // we already have a unused image // (maybe it was set before reading the header) pic = s->current_picture_ptr; } else { i = ff_find_unused_picture(s->avctx, s->picture, 0); if (i < 0) { av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n"); return i; } pic = &s->picture[i]; } pic->reference = 0; if (!s->droppable) { if (s->pict_type != AV_PICTURE_TYPE_B) pic->reference = 3; } pic->f->coded_picture_number = s->coded_picture_number++; if (alloc_picture(s, pic, 0) < 0) return -1; s->current_picture_ptr = pic; // FIXME use only the vars from current_pic s->current_picture_ptr->f->top_field_first = s->top_field_first; if (s->codec_id == AV_CODEC_ID_MPEG1VIDEO || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { if (s->picture_structure != PICT_FRAME) s->current_picture_ptr->f->top_field_first = (s->picture_structure == PICT_TOP_FIELD) == s->first_field; } s->current_picture_ptr->f->interlaced_frame = !s->progressive_frame && !s->progressive_sequence; s->current_picture_ptr->field_picture = s->picture_structure != PICT_FRAME; s->current_picture_ptr->f->pict_type = s->pict_type; // if (s->avctx->flags && AV_CODEC_FLAG_QSCALE) // s->current_picture_ptr->quality = s->new_picture_ptr->quality; s->current_picture_ptr->f->key_frame = s->pict_type == AV_PICTURE_TYPE_I; if ((ret = ff_mpeg_ref_picture(s->avctx, &s->current_picture, s->current_picture_ptr)) < 0) return ret; if (s->pict_type != AV_PICTURE_TYPE_B) { s->last_picture_ptr = s->next_picture_ptr; if (!s->droppable) s->next_picture_ptr = s->current_picture_ptr; } ff_dlog(s->avctx, "L%p N%p C%p L%p N%p C%p type:%d drop:%d\n", s->last_picture_ptr, s->next_picture_ptr,s->current_picture_ptr, s->last_picture_ptr ? s->last_picture_ptr->f->data[0] : NULL, s->next_picture_ptr ? s->next_picture_ptr->f->data[0] : NULL, s->current_picture_ptr ? s->current_picture_ptr->f->data[0] : NULL, s->pict_type, s->droppable); if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) && (s->pict_type != AV_PICTURE_TYPE_I || s->picture_structure != PICT_FRAME)) { int h_chroma_shift, v_chroma_shift; av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt, &h_chroma_shift, &v_chroma_shift); if (s->pict_type != AV_PICTURE_TYPE_I) av_log(avctx, AV_LOG_ERROR, "warning: first frame is no keyframe\n"); else if (s->picture_structure != PICT_FRAME) av_log(avctx, AV_LOG_INFO, "allocate dummy last picture for field based first keyframe\n"); /* Allocate a dummy frame */ i = ff_find_unused_picture(s->avctx, s->picture, 0); if (i < 0) { av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n"); return i; } s->last_picture_ptr = &s->picture[i]; s->last_picture_ptr->reference = 3; s->last_picture_ptr->f->pict_type = AV_PICTURE_TYPE_I; if (alloc_picture(s, s->last_picture_ptr, 0) < 0) { s->last_picture_ptr = NULL; return -1; } memset(s->last_picture_ptr->f->data[0], 0, avctx->height * s->last_picture_ptr->f->linesize[0]); memset(s->last_picture_ptr->f->data[1], 0x80, (avctx->height >> v_chroma_shift) * s->last_picture_ptr->f->linesize[1]); memset(s->last_picture_ptr->f->data[2], 0x80, (avctx->height >> v_chroma_shift) * s->last_picture_ptr->f->linesize[2]); ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0); ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 1); } if ((!s->next_picture_ptr || !s->next_picture_ptr->f->buf[0]) && s->pict_type == AV_PICTURE_TYPE_B) { /* Allocate a dummy frame */ i = ff_find_unused_picture(s->avctx, s->picture, 0); if (i < 0) { av_log(s->avctx, AV_LOG_ERROR, "no frame buffer available\n"); return i; } s->next_picture_ptr = &s->picture[i]; s->next_picture_ptr->reference = 3; s->next_picture_ptr->f->pict_type = AV_PICTURE_TYPE_I; if (alloc_picture(s, s->next_picture_ptr, 0) < 0) { s->next_picture_ptr = NULL; return -1; } ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 0); ff_thread_report_progress(&s->next_picture_ptr->tf, INT_MAX, 1); } if (s->last_picture_ptr) { ff_mpeg_unref_picture(s->avctx, &s->last_picture); if (s->last_picture_ptr->f->buf[0] && (ret = ff_mpeg_ref_picture(s->avctx, &s->last_picture, s->last_picture_ptr)) < 0) return ret; } if (s->next_picture_ptr) { ff_mpeg_unref_picture(s->avctx, &s->next_picture); if (s->next_picture_ptr->f->buf[0] && (ret = ff_mpeg_ref_picture(s->avctx, &s->next_picture, s->next_picture_ptr)) < 0) return ret; } if (s->pict_type != AV_PICTURE_TYPE_I && !(s->last_picture_ptr && s->last_picture_ptr->f->buf[0])) { av_log(s, AV_LOG_ERROR, "Non-reference picture received and no reference available\n"); return AVERROR_INVALIDDATA; } if (s->picture_structure!= PICT_FRAME) { int i; for (i = 0; i < 4; i++) { if (s->picture_structure == PICT_BOTTOM_FIELD) { s->current_picture.f->data[i] += s->current_picture.f->linesize[i]; } s->current_picture.f->linesize[i] *= 2; s->last_picture.f->linesize[i] *= 2; s->next_picture.f->linesize[i] *= 2; } } /* set dequantizer, we can't do it during init as * it might change for MPEG-4 and we can't do it in the header * decode as init is not called for MPEG-4 there yet */ if (s->mpeg_quant || s->codec_id == AV_CODEC_ID_MPEG2VIDEO) { s->dct_unquantize_intra = s->dct_unquantize_mpeg2_intra; s->dct_unquantize_inter = s->dct_unquantize_mpeg2_inter; } else if (s->out_format == FMT_H263 || s->out_format == FMT_H261) { s->dct_unquantize_intra = s->dct_unquantize_h263_intra; s->dct_unquantize_inter = s->dct_unquantize_h263_inter; } else { s->dct_unquantize_intra = s->dct_unquantize_mpeg1_intra; s->dct_unquantize_inter = s->dct_unquantize_mpeg1_inter; } #if FF_API_XVMC FF_DISABLE_DEPRECATION_WARNINGS if (CONFIG_MPEG_XVMC_DECODER && s->avctx->xvmc_acceleration) return ff_xvmc_field_start(s, avctx); FF_ENABLE_DEPRECATION_WARNINGS #endif /* FF_API_XVMC */ return 0; }