FFmpeg: libavcodec/libxvid_rc.c Source File

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libavcodec

libxvid_rc.c

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1 /*

2 * Xvid rate control wrapper for lavc video encoders

3 *

5 *

6 * This file is part of FFmpeg.

7 *

8 * FFmpeg is free software; you can redistribute it and/or

9 * modify it under the terms of the GNU Lesser General Public

10 * License as published by the Free Software Foundation; either

11 * version 2.1 of the License, or (at your option) any later version.

12 *

13 * FFmpeg is distributed in the hope that it will be useful,

14 * but WITHOUT ANY WARRANTY; without even the implied warranty of

15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

16 * Lesser General Public License for more details.

17 *

18 * You should have received a copy of the GNU Lesser General Public

19 * License along with FFmpeg; if not, write to the Free Software

20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

21 */

23 #include "config.h"

24 #include <xvid.h>

25 #include <unistd.h>

26 #include "libavutil/attributes.h"

27 #include "libavutil/file.h"

28 #include "avcodec.h"

29 #include "libxvid.h"

30 #include "mpegvideo.h"

32 #undef NDEBUG

33 #include <assert.h>

35 av_cold int ff_xvid_rate_control_init(MpegEncContext *s)

36 {

37 char *tmp_name;

38 int fd, i;

39 xvid_plg_create_t xvid_plg_create = { 0 };

40 xvid_plugin_2pass2_t xvid_2pass2 = { 0 };

42 fd=av_tempfile("xvidrc.", &tmp_name, 0, s->avctx);

43 if (fd == -1) {

44 av_log(NULL, AV_LOG_ERROR, "Can't create temporary pass2 file.\n");

45 return -1;

46 }

48 for(i=0; i<s->rc_context.num_entries; i++){

49 static const char frame_types[] = " ipbs";

50 char tmp[256];

51 RateControlEntry *rce;

53 rce= &s->rc_context.entry[i];

55 snprintf(tmp, sizeof(tmp), "%c %d %d %d %d %d %d\n",

56 frame_types[rce->pict_type], (int)lrintf(rce->qscale / FF_QP2LAMBDA), rce->i_count, s->mb_num - rce->i_count - rce->skip_count,

57 rce->skip_count, (rce->i_tex_bits + rce->p_tex_bits + rce->misc_bits+7)/8, (rce->header_bits+rce->mv_bits+7)/8);

59 if (write(fd, tmp, strlen(tmp)) < 0) {

60 av_log(NULL, AV_LOG_ERROR, "Error %s writing 2pass logfile\n", strerror(errno));

61 av_free(tmp_name);

62 close(fd);

63 return AVERROR(errno);

64 }

65 }

67 close(fd);

69 xvid_2pass2.version= XVID_MAKE_VERSION(1,1,0);

70 xvid_2pass2.filename= tmp_name;

71 xvid_2pass2.bitrate= s->avctx->bit_rate;

72 xvid_2pass2.vbv_size= s->avctx->rc_buffer_size;

73 xvid_2pass2.vbv_maxrate= s->avctx->rc_max_rate;

74 xvid_2pass2.vbv_initial= s->avctx->rc_initial_buffer_occupancy;

76 xvid_plg_create.version= XVID_MAKE_VERSION(1,1,0);

77 xvid_plg_create.fbase= s->avctx->time_base.den;

78 xvid_plg_create.fincr= s->avctx->time_base.num;

79 xvid_plg_create.param= &xvid_2pass2;

81 if(xvid_plugin_2pass2(NULL, XVID_PLG_CREATE, &xvid_plg_create, &s->rc_context.non_lavc_opaque)<0){

82 av_log(NULL, AV_LOG_ERROR, "xvid_plugin_2pass2 failed\n");

83 return -1;

84 }

85 return 0;

86 }

88 float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run){

89 xvid_plg_data_t xvid_plg_data = { 0 };

91 xvid_plg_data.version= XVID_MAKE_VERSION(1,1,0);

92 xvid_plg_data.width = s->width;

93 xvid_plg_data.height= s->height;

94 xvid_plg_data.mb_width = s->mb_width;

95 xvid_plg_data.mb_height= s->mb_height;

96 xvid_plg_data.fbase= s->avctx->time_base.den;

97 xvid_plg_data.fincr= s->avctx->time_base.num;

98 xvid_plg_data.min_quant[0]= s->avctx->qmin;

99 xvid_plg_data.min_quant[1]= s->avctx->qmin;

100 xvid_plg_data.min_quant[2]= s->avctx->qmin; //FIXME i/b factor & offset

101 xvid_plg_data.max_quant[0]= s->avctx->qmax;

102 xvid_plg_data.max_quant[1]= s->avctx->qmax;

103 xvid_plg_data.max_quant[2]= s->avctx->qmax; //FIXME i/b factor & offset

104 xvid_plg_data.bquant_offset = 0; // 100 * s->avctx->b_quant_offset;

105 xvid_plg_data.bquant_ratio = 100; // * s->avctx->b_quant_factor;

106

107 if(!s->rc_context.dry_run_qscale){

108 if(s->picture_number){

109 xvid_plg_data.length=

110 xvid_plg_data.stats.length= (s->frame_bits + 7)/8;

111 xvid_plg_data.frame_num= s->rc_context.last_picture_number;

112 xvid_plg_data.quant= s->qscale;

113

114 xvid_plg_data.type= s->last_pict_type;

115 if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_AFTER, &xvid_plg_data, NULL)){

116 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_AFTER, ...) FAILED\n");

117 return -1;

118 }

119 }

120 s->rc_context.last_picture_number=

121 xvid_plg_data.frame_num= s->picture_number;

122 xvid_plg_data.quant= 0;

123 if(xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_BEFORE, &xvid_plg_data, NULL)){

124 av_log(s->avctx, AV_LOG_ERROR, "xvid_plugin_2pass2(handle, XVID_PLG_BEFORE, ...) FAILED\n");

125 return -1;

126 }

127 s->rc_context.dry_run_qscale= xvid_plg_data.quant;

128 }

129 xvid_plg_data.quant= s->rc_context.dry_run_qscale;

130 if(!dry_run)

131 s->rc_context.dry_run_qscale= 0;

132

133 if(s->pict_type == AV_PICTURE_TYPE_B) //FIXME this is not exactly identical to xvid

134 return xvid_plg_data.quant * FF_QP2LAMBDA * s->avctx->b_quant_factor + s->avctx->b_quant_offset;

135 else

136 return xvid_plg_data.quant * FF_QP2LAMBDA;

137 }

138

139 av_cold void ff_xvid_rate_control_uninit(MpegEncContext *s)

140 {

141 xvid_plg_destroy_t xvid_plg_destroy;

142

143 xvid_plugin_2pass2(s->rc_context.non_lavc_opaque, XVID_PLG_DESTROY, &xvid_plg_destroy, NULL);

144 }

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