diff options
Diffstat (limited to 'ffmpeg/libavutil/frame.c')
| -rw-r--r-- | ffmpeg/libavutil/frame.c | 559 |
1 files changed, 559 insertions, 0 deletions
diff --git a/ffmpeg/libavutil/frame.c b/ffmpeg/libavutil/frame.c new file mode 100644 index 0000000..2ec75e4 --- /dev/null +++ b/ffmpeg/libavutil/frame.c @@ -0,0 +1,559 @@ +/* + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "channel_layout.h" +#include "avassert.h" +#include "buffer.h" +#include "common.h" +#include "dict.h" +#include "frame.h" +#include "imgutils.h" +#include "mem.h" +#include "samplefmt.h" + +#define MAKE_ACCESSORS(str, name, type, field) \ + type av_##name##_get_##field(const str *s) { return s->field; } \ + void av_##name##_set_##field(str *s, type v) { s->field = v; } + +MAKE_ACCESSORS(AVFrame, frame, int64_t, best_effort_timestamp) +MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_duration) +MAKE_ACCESSORS(AVFrame, frame, int64_t, pkt_pos) +MAKE_ACCESSORS(AVFrame, frame, int64_t, channel_layout) +MAKE_ACCESSORS(AVFrame, frame, int, channels) +MAKE_ACCESSORS(AVFrame, frame, int, sample_rate) +MAKE_ACCESSORS(AVFrame, frame, AVDictionary *, metadata) +MAKE_ACCESSORS(AVFrame, frame, int, decode_error_flags) +MAKE_ACCESSORS(AVFrame, frame, int, pkt_size) + +#define CHECK_CHANNELS_CONSISTENCY(frame) \ + av_assert2(!(frame)->channel_layout || \ + (frame)->channels == \ + av_get_channel_layout_nb_channels((frame)->channel_layout)) + +AVDictionary **avpriv_frame_get_metadatap(AVFrame *frame) {return &frame->metadata;}; + +int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int qp_type) +{ + av_buffer_unref(&f->qp_table_buf); + + f->qp_table_buf = buf; + + f->qscale_table = buf->data; + f->qstride = stride; + f->qscale_type = qp_type; + + return 0; +} + +int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type) +{ + *stride = f->qstride; + *type = f->qscale_type; + + if (!f->qp_table_buf) + return NULL; + + return f->qp_table_buf->data; +} + +static void get_frame_defaults(AVFrame *frame) +{ + if (frame->extended_data != frame->data) + av_freep(&frame->extended_data); + + memset(frame, 0, sizeof(*frame)); + + frame->pts = + frame->pkt_dts = + frame->pkt_pts = AV_NOPTS_VALUE; + av_frame_set_best_effort_timestamp(frame, AV_NOPTS_VALUE); + av_frame_set_pkt_duration (frame, 0); + av_frame_set_pkt_pos (frame, -1); + av_frame_set_pkt_size (frame, -1); + frame->key_frame = 1; + frame->sample_aspect_ratio = (AVRational){ 0, 1 }; + frame->format = -1; /* unknown */ + frame->extended_data = frame->data; +} + +AVFrame *av_frame_alloc(void) +{ + AVFrame *frame = av_mallocz(sizeof(*frame)); + + if (!frame) + return NULL; + + frame->extended_data = NULL; + get_frame_defaults(frame); + + return frame; +} + +void av_frame_free(AVFrame **frame) +{ + if (!frame || !*frame) + return; + + av_frame_unref(*frame); + av_freep(frame); +} + +static int get_video_buffer(AVFrame *frame, int align) +{ + const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); + int ret, i; + + if (!desc) + return AVERROR(EINVAL); + + if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0) + return ret; + + if (!frame->linesize[0]) { + ret = av_image_fill_linesizes(frame->linesize, frame->format, + frame->width); + if (ret < 0) + return ret; + + for (i = 0; i < 4 && frame->linesize[i]; i++) + frame->linesize[i] = FFALIGN(frame->linesize[i], align); + } + + for (i = 0; i < 4 && frame->linesize[i]; i++) { + int h = FFALIGN(frame->height, 32); + if (i == 1 || i == 2) + h = -((-h) >> desc->log2_chroma_h); + + frame->buf[i] = av_buffer_alloc(frame->linesize[i] * h + 16); + if (!frame->buf[i]) + goto fail; + + frame->data[i] = frame->buf[i]->data; + } + if (desc->flags & PIX_FMT_PAL || desc->flags & PIX_FMT_PSEUDOPAL) { + av_buffer_unref(&frame->buf[1]); + frame->buf[1] = av_buffer_alloc(1024); + if (!frame->buf[1]) + goto fail; + frame->data[1] = frame->buf[1]->data; + } + + frame->extended_data = frame->data; + + return 0; +fail: + av_frame_unref(frame); + return AVERROR(ENOMEM); +} + +static int get_audio_buffer(AVFrame *frame, int align) +{ + int channels = frame->channels; + int planar = av_sample_fmt_is_planar(frame->format); + int planes = planar ? channels : 1; + int ret, i; + + CHECK_CHANNELS_CONSISTENCY(frame); + if (!frame->linesize[0]) { + ret = av_samples_get_buffer_size(&frame->linesize[0], channels, + frame->nb_samples, frame->format, + align); + if (ret < 0) + return ret; + } + + if (planes > AV_NUM_DATA_POINTERS) { + frame->extended_data = av_mallocz(planes * + sizeof(*frame->extended_data)); + frame->extended_buf = av_mallocz((planes - AV_NUM_DATA_POINTERS) * + sizeof(*frame->extended_buf)); + if (!frame->extended_data || !frame->extended_buf) { + av_freep(&frame->extended_data); + av_freep(&frame->extended_buf); + return AVERROR(ENOMEM); + } + frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS; + } else + frame->extended_data = frame->data; + + for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) { + frame->buf[i] = av_buffer_alloc(frame->linesize[0]); + if (!frame->buf[i]) { + av_frame_unref(frame); + return AVERROR(ENOMEM); + } + frame->extended_data[i] = frame->data[i] = frame->buf[i]->data; + } + for (i = 0; i < planes - AV_NUM_DATA_POINTERS; i++) { + frame->extended_buf[i] = av_buffer_alloc(frame->linesize[0]); + if (!frame->extended_buf[i]) { + av_frame_unref(frame); + return AVERROR(ENOMEM); + } + frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data; + } + return 0; + +} + +int av_frame_get_buffer(AVFrame *frame, int align) +{ + if (frame->format < 0) + return AVERROR(EINVAL); + + if (frame->width > 0 && frame->height > 0) + return get_video_buffer(frame, align); + else if (frame->nb_samples > 0 && frame->channel_layout) + return get_audio_buffer(frame, align); + + return AVERROR(EINVAL); +} + +int av_frame_ref(AVFrame *dst, AVFrame *src) +{ + int i, ret = 0; + + dst->format = src->format; + dst->width = src->width; + dst->height = src->height; + dst->channels = src->channels; + dst->channel_layout = src->channel_layout; + dst->nb_samples = src->nb_samples; + + ret = av_frame_copy_props(dst, src); + if (ret < 0) + return ret; + + /* duplicate the frame data if it's not refcounted */ + if (!src->buf[0]) { + ret = av_frame_get_buffer(dst, 32); + if (ret < 0) + return ret; + + if (src->nb_samples) { + int ch = src->channels; + CHECK_CHANNELS_CONSISTENCY(src); + av_samples_copy(dst->extended_data, src->extended_data, 0, 0, + dst->nb_samples, ch, dst->format); + } else { + av_image_copy(dst->data, dst->linesize, src->data, src->linesize, + dst->format, dst->width, dst->height); + } + return 0; + } + + /* ref the buffers */ + for (i = 0; i < FF_ARRAY_ELEMS(src->buf) && src->buf[i]; i++) { + dst->buf[i] = av_buffer_ref(src->buf[i]); + if (!dst->buf[i]) { + ret = AVERROR(ENOMEM); + goto fail; + } + } + + if (src->extended_buf) { + dst->extended_buf = av_mallocz(sizeof(*dst->extended_buf) * + src->nb_extended_buf); + if (!dst->extended_buf) { + ret = AVERROR(ENOMEM); + goto fail; + } + dst->nb_extended_buf = src->nb_extended_buf; + + for (i = 0; i < src->nb_extended_buf; i++) { + dst->extended_buf[i] = av_buffer_ref(src->extended_buf[i]); + if (!dst->extended_buf[i]) { + ret = AVERROR(ENOMEM); + goto fail; + } + } + } + + /* duplicate extended data */ + if (src->extended_data != src->data) { + int ch = src->channels; + + if (!ch) { + ret = AVERROR(EINVAL); + goto fail; + } + CHECK_CHANNELS_CONSISTENCY(src); + + dst->extended_data = av_malloc(sizeof(*dst->extended_data) * ch); + if (!dst->extended_data) { + ret = AVERROR(ENOMEM); + goto fail; + } + memcpy(dst->extended_data, src->extended_data, sizeof(*src->extended_data) * ch); + } else + dst->extended_data = dst->data; + + memcpy(dst->data, src->data, sizeof(src->data)); + memcpy(dst->linesize, src->linesize, sizeof(src->linesize)); + + return 0; + +fail: + av_frame_unref(dst); + return ret; +} + +AVFrame *av_frame_clone(AVFrame *src) +{ + AVFrame *ret = av_frame_alloc(); + + if (!ret) + return NULL; + + if (av_frame_ref(ret, src) < 0) + av_frame_free(&ret); + + return ret; +} + +void av_frame_unref(AVFrame *frame) +{ + int i; + + for (i = 0; i < frame->nb_side_data; i++) { + av_freep(&frame->side_data[i]->data); + av_dict_free(&frame->side_data[i]->metadata); + av_freep(&frame->side_data[i]); + } + av_freep(&frame->side_data); + + for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++) + av_buffer_unref(&frame->buf[i]); + for (i = 0; i < frame->nb_extended_buf; i++) + av_buffer_unref(&frame->extended_buf[i]); + av_freep(&frame->extended_buf); + av_dict_free(&frame->metadata); + av_buffer_unref(&frame->qp_table_buf); + + get_frame_defaults(frame); +} + +void av_frame_move_ref(AVFrame *dst, AVFrame *src) +{ + *dst = *src; + if (src->extended_data == src->data) + dst->extended_data = dst->data; + memset(src, 0, sizeof(*src)); + get_frame_defaults(src); +} + +int av_frame_is_writable(AVFrame *frame) +{ + int i, ret = 1; + + /* assume non-refcounted frames are not writable */ + if (!frame->buf[0]) + return 0; + + for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) + ret &= !!av_buffer_is_writable(frame->buf[i]); + for (i = 0; i < frame->nb_extended_buf; i++) + ret &= !!av_buffer_is_writable(frame->extended_buf[i]); + + return ret; +} + +int av_frame_make_writable(AVFrame *frame) +{ + AVFrame tmp; + int ret; + + if (!frame->buf[0]) + return AVERROR(EINVAL); + + if (av_frame_is_writable(frame)) + return 0; + + memset(&tmp, 0, sizeof(tmp)); + tmp.format = frame->format; + tmp.width = frame->width; + tmp.height = frame->height; + tmp.channels = frame->channels; + tmp.channel_layout = frame->channel_layout; + tmp.nb_samples = frame->nb_samples; + ret = av_frame_get_buffer(&tmp, 32); + if (ret < 0) + return ret; + + if (tmp.nb_samples) { + int ch = tmp.channels; + CHECK_CHANNELS_CONSISTENCY(&tmp); + av_samples_copy(tmp.extended_data, frame->extended_data, 0, 0, + frame->nb_samples, ch, frame->format); + } else { + av_image_copy(tmp.data, tmp.linesize, frame->data, frame->linesize, + frame->format, frame->width, frame->height); + } + + ret = av_frame_copy_props(&tmp, frame); + if (ret < 0) { + av_frame_unref(&tmp); + return ret; + } + + av_frame_unref(frame); + + *frame = tmp; + if (tmp.data == tmp.extended_data) + frame->extended_data = frame->data; + + return 0; +} + +int av_frame_copy_props(AVFrame *dst, const AVFrame *src) +{ + int i; + + dst->key_frame = src->key_frame; + dst->pict_type = src->pict_type; + dst->sample_aspect_ratio = src->sample_aspect_ratio; + dst->pts = src->pts; + dst->interlaced_frame = src->interlaced_frame; + dst->top_field_first = src->top_field_first; + dst->sample_rate = src->sample_rate; + dst->opaque = src->opaque; +#if FF_API_AVFRAME_LAVC + dst->type = src->type; +#endif + dst->pkt_pts = src->pkt_pts; + dst->pkt_dts = src->pkt_dts; + dst->pkt_pos = src->pkt_pos; + dst->pkt_size = src->pkt_size; + dst->pkt_duration = src->pkt_duration; + dst->reordered_opaque = src->reordered_opaque; + dst->quality = src->quality; + dst->best_effort_timestamp = src->best_effort_timestamp; + dst->coded_picture_number = src->coded_picture_number; + dst->display_picture_number = src->display_picture_number; + dst->decode_error_flags = src->decode_error_flags; + + av_dict_copy(&dst->metadata, src->metadata, 0); + + for (i = 0; i < src->nb_side_data; i++) { + const AVFrameSideData *sd_src = src->side_data[i]; + AVFrameSideData *sd_dst = av_frame_new_side_data(dst, sd_src->type, + sd_src->size); + if (!sd_dst) { + for (i = 0; i < dst->nb_side_data; i++) { + av_freep(&dst->side_data[i]->data); + av_freep(&dst->side_data[i]); + av_dict_free(&dst->side_data[i]->metadata); + } + av_freep(&dst->side_data); + return AVERROR(ENOMEM); + } + memcpy(sd_dst->data, sd_src->data, sd_src->size); + av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0); + } + + dst->qscale_table = NULL; + dst->qstride = 0; + dst->qscale_type = 0; + if (src->qp_table_buf) { + dst->qp_table_buf = av_buffer_ref(src->qp_table_buf); + if (dst->qp_table_buf) { + dst->qscale_table = dst->qp_table_buf->data; + dst->qstride = src->qstride; + dst->qscale_type = src->qscale_type; + } + } + + return 0; +} + +AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane) +{ + uint8_t *data; + int planes, i; + + if (frame->nb_samples) { + int channels = frame->channels; + if (!channels) + return NULL; + CHECK_CHANNELS_CONSISTENCY(frame); + planes = av_sample_fmt_is_planar(frame->format) ? channels : 1; + } else + planes = 4; + + if (plane < 0 || plane >= planes || !frame->extended_data[plane]) + return NULL; + data = frame->extended_data[plane]; + + for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) { + AVBufferRef *buf = frame->buf[i]; + if (data >= buf->data && data < buf->data + buf->size) + return buf; + } + for (i = 0; i < frame->nb_extended_buf; i++) { + AVBufferRef *buf = frame->extended_buf[i]; + if (data >= buf->data && data < buf->data + buf->size) + return buf; + } + return NULL; +} + +AVFrameSideData *av_frame_new_side_data(AVFrame *frame, + enum AVFrameSideDataType type, + int size) +{ + AVFrameSideData *ret, **tmp; + + if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1) + return NULL; + + tmp = av_realloc(frame->side_data, + (frame->nb_side_data + 1) * sizeof(*frame->side_data)); + if (!tmp) + return NULL; + frame->side_data = tmp; + + ret = av_mallocz(sizeof(*ret)); + if (!ret) + return NULL; + + ret->data = av_malloc(size); + if (!ret->data) { + av_freep(&ret); + return NULL; + } + + ret->size = size; + ret->type = type; + + frame->side_data[frame->nb_side_data++] = ret; + + return ret; +} + +AVFrameSideData *av_frame_get_side_data(AVFrame *frame, + enum AVFrameSideDataType type) +{ + int i; + + for (i = 0; i < frame->nb_side_data; i++) { + if (frame->side_data[i]->type == type) + return frame->side_data[i]; + } + return NULL; +} |