diff options
Diffstat (limited to 'ffmpeg/libavcodec/libschroedinger.c')
| -rw-r--r-- | ffmpeg/libavcodec/libschroedinger.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/libschroedinger.c b/ffmpeg/libavcodec/libschroedinger.c new file mode 100644 index 0000000..f452d70 --- /dev/null +++ b/ffmpeg/libavcodec/libschroedinger.c @@ -0,0 +1,221 @@ +/* + * Copyright (c) 2008 BBC, Anuradha Suraparaju <asuraparaju at gmail dot com > + * + * 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 + */ + +/** +* @file +* function definitions common to libschroedinger decoder and encoder +*/ + +#include "libschroedinger.h" +#include "libavutil/mem.h" + +static const SchroVideoFormatInfo ff_schro_video_format_info[] = { + { 640, 480, 24000, 1001}, + { 176, 120, 15000, 1001}, + { 176, 144, 25, 2 }, + { 352, 240, 15000, 1001}, + { 352, 288, 25, 2 }, + { 704, 480, 15000, 1001}, + { 704, 576, 25, 2 }, + { 720, 480, 30000, 1001}, + { 720, 576, 25, 1 }, + { 1280, 720, 60000, 1001}, + { 1280, 720, 50, 1 }, + { 1920, 1080, 30000, 1001}, + { 1920, 1080, 25, 1 }, + { 1920, 1080, 60000, 1001}, + { 1920, 1080, 50, 1 }, + { 2048, 1080, 24, 1 }, + { 4096, 2160, 24, 1 }, +}; + +static unsigned int get_video_format_idx(AVCodecContext *avctx) +{ + unsigned int ret_idx = 0; + unsigned int idx; + unsigned int num_formats = sizeof(ff_schro_video_format_info) / + sizeof(ff_schro_video_format_info[0]); + + for (idx = 1; idx < num_formats; ++idx) { + const SchroVideoFormatInfo *vf = &ff_schro_video_format_info[idx]; + if (avctx->width == vf->width && + avctx->height == vf->height) { + ret_idx = idx; + if (avctx->time_base.den == vf->frame_rate_num && + avctx->time_base.num == vf->frame_rate_denom) + return idx; + } + } + return ret_idx; +} + +void ff_schro_queue_init(FFSchroQueue *queue) +{ + queue->p_head = queue->p_tail = NULL; + queue->size = 0; +} + +void ff_schro_queue_free(FFSchroQueue *queue, void (*free_func)(void *)) +{ + while (queue->p_head) + free_func(ff_schro_queue_pop(queue)); +} + +int ff_schro_queue_push_back(FFSchroQueue *queue, void *p_data) +{ + FFSchroQueueElement *p_new = av_mallocz(sizeof(FFSchroQueueElement)); + + if (!p_new) + return -1; + + p_new->data = p_data; + + if (!queue->p_head) + queue->p_head = p_new; + else + queue->p_tail->next = p_new; + queue->p_tail = p_new; + + ++queue->size; + return 0; +} + +void *ff_schro_queue_pop(FFSchroQueue *queue) +{ + FFSchroQueueElement *top = queue->p_head; + + if (top) { + void *data = top->data; + queue->p_head = queue->p_head->next; + --queue->size; + av_freep(&top); + return data; + } + + return NULL; +} + +/** +* Schroedinger video preset table. Ensure that this tables matches up correctly +* with the ff_schro_video_format_info table. +*/ +static const SchroVideoFormatEnum ff_schro_video_formats[]={ + SCHRO_VIDEO_FORMAT_CUSTOM , + SCHRO_VIDEO_FORMAT_QSIF , + SCHRO_VIDEO_FORMAT_QCIF , + SCHRO_VIDEO_FORMAT_SIF , + SCHRO_VIDEO_FORMAT_CIF , + SCHRO_VIDEO_FORMAT_4SIF , + SCHRO_VIDEO_FORMAT_4CIF , + SCHRO_VIDEO_FORMAT_SD480I_60 , + SCHRO_VIDEO_FORMAT_SD576I_50 , + SCHRO_VIDEO_FORMAT_HD720P_60 , + SCHRO_VIDEO_FORMAT_HD720P_50 , + SCHRO_VIDEO_FORMAT_HD1080I_60 , + SCHRO_VIDEO_FORMAT_HD1080I_50 , + SCHRO_VIDEO_FORMAT_HD1080P_60 , + SCHRO_VIDEO_FORMAT_HD1080P_50 , + SCHRO_VIDEO_FORMAT_DC2K_24 , + SCHRO_VIDEO_FORMAT_DC4K_24 , +}; + +SchroVideoFormatEnum ff_get_schro_video_format_preset(AVCodecContext *avctx) +{ + unsigned int num_formats = sizeof(ff_schro_video_formats) / + sizeof(ff_schro_video_formats[0]); + + unsigned int idx = get_video_format_idx(avctx); + + return (idx < num_formats) ? ff_schro_video_formats[idx] : + SCHRO_VIDEO_FORMAT_CUSTOM; +} + +int ff_get_schro_frame_format (SchroChromaFormat schro_pix_fmt, + SchroFrameFormat *schro_frame_fmt) +{ + unsigned int num_formats = sizeof(schro_pixel_format_map) / + sizeof(schro_pixel_format_map[0]); + + int idx; + + for (idx = 0; idx < num_formats; ++idx) { + if (schro_pixel_format_map[idx].schro_pix_fmt == schro_pix_fmt) { + *schro_frame_fmt = schro_pixel_format_map[idx].schro_frame_fmt; + return 0; + } + } + return -1; +} + +static void free_schro_frame(SchroFrame *frame, void *priv) +{ + AVPicture *p_pic = priv; + + if (!p_pic) + return; + + avpicture_free(p_pic); + av_freep(&p_pic); +} + +SchroFrame *ff_create_schro_frame(AVCodecContext *avctx, + SchroFrameFormat schro_frame_fmt) +{ + AVPicture *p_pic; + SchroFrame *p_frame; + int y_width, uv_width; + int y_height, uv_height; + int i; + + y_width = avctx->width; + y_height = avctx->height; + uv_width = y_width >> (SCHRO_FRAME_FORMAT_H_SHIFT(schro_frame_fmt)); + uv_height = y_height >> (SCHRO_FRAME_FORMAT_V_SHIFT(schro_frame_fmt)); + + p_pic = av_mallocz(sizeof(AVPicture)); + if (!p_pic || avpicture_alloc(p_pic, avctx->pix_fmt, y_width, y_height) < 0) { + av_free(p_pic); + return NULL; + } + + p_frame = schro_frame_new(); + p_frame->format = schro_frame_fmt; + p_frame->width = y_width; + p_frame->height = y_height; + schro_frame_set_free_callback(p_frame, free_schro_frame, (void *)p_pic); + + for (i = 0; i < 3; ++i) { + p_frame->components[i].width = i ? uv_width : y_width; + p_frame->components[i].stride = p_pic->linesize[i]; + p_frame->components[i].height = i ? uv_height : y_height; + p_frame->components[i].length = + p_frame->components[i].stride * p_frame->components[i].height; + p_frame->components[i].data = p_pic->data[i]; + + if (i) { + p_frame->components[i].v_shift = + SCHRO_FRAME_FORMAT_V_SHIFT(p_frame->format); + p_frame->components[i].h_shift = + SCHRO_FRAME_FORMAT_H_SHIFT(p_frame->format); + } + } + + return p_frame; +} |